item: #1 of 59 id: geosites-100 author: Shapiro, Russell; Dehler, Carol title: Geobiology of "Snowball Earth" deposits of Antelope Island date: 2022 words: 5577 flesch: 56 summary: Utah Geosites 2019 Utah Geological Association Publication 48 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors Russell Shapiro1 and Carol Dehler2 1 Department of Geological and Environmental Sciences, California State University-Chico, CA 95929, rsshapiro@csuchico.edu 2 Department of Geology, Utah State University, Logan, UT 84322 Geobiology of “Snowball Earth” Deposits of Antelope Island Cover Image: View of the outcrops of the lower dolostone of the Kelley Canyon Formation at the geosite. 4 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors 2019 Utah Geological Association Publication 48 Finally, in the Neoproterozoic, there is a small resurgence of iron formation, suggesting low oxygen or high iron input conditions that is also likely related to the decoupling of the ocean from the atmosphere by ice sheets and the continued input of reduced forms of elements such as iron from sea floor spreading, subaque- ous mantle input, and sedimentation (Cox and others, 2013). keywords: antelope; canyon; earth; figure; formation; geological; ice; island; kelley; neoproterozoic; snowball; utah cache: geosites-100.pdf plain text: geosites-100.txt item: #2 of 59 id: geosites-105 author: Brinkerhoff, Riley; Vanden Berg, Michael; Millard, Mark title: Using pore system characterization to subdivide the burgeoning Uteland Butte Play, Green River Formation, Uinta Basin, Utah date: 2022 words: 935 flesch: 39 summary: The UBm can be divided into sub-plays by district using the dominant pore systems in each area. We defined four distinct sub-plays within the Uinta Basin: 1) intergranular-dominated porosity, 2) intercrystalline- pore-dominated dolomite, 3) mixed intercrystalline-organic porosity, and 4) organic porosity. keywords: play; sub; uga cache: geosites-105.htm plain text: geosites-105.txt item: #3 of 59 id: geosites-106 author: Gall, Ryan; Birdwell, Justin; Brinkerhoff, Riley; Vanden Berg, Michael title: Geologic characterization and depositional history of the Uteland Butte Member, Green River Formation, southwestern Uinta Basin, Utah date: 2022 words: 721 flesch: 19 summary: Abstract The 15- to 65-m-thick informal Uteland Butte member of the Eocene Green River Formation represents the first widespread transgression of Lake Uinta in the Uinta Basin, Utah. Siliciclastic clay-rich and carbonaterich intervals are correlated across the region and indicate distinct siliciclastic- and carbonate-dominated lake phases during Uteland Butte member deposition. keywords: member; uga; ugf cache: geosites-106.htm plain text: geosites-106.txt item: #4 of 59 id: geosites-107 author: Schmude, David; Berwick, Brian title: Lacustrine source rocks and unconventional oil resource plays: A case study from the Eocene Green River Formation of the Uinta Basin, Utah date: 2022 words: 642 flesch: 36 summary: Abstract Much information exists on unconventional oil resource plays, their drivers to success and sweet-spot fair- ways. These unique aspects provide exceptionally elevated formation pressures within the source rock  in the oil generative window, setting it apart from other unconventional oil resource plays. keywords: oil; uga; ugf cache: geosites-107.htm plain text: geosites-107.txt item: #5 of 59 id: geosites-108 author: Birgenheier, Lauren; Toms, Leah title: Paleoenvironmental reconstructions along the southern margin of Eocene Lake Uinta during a period of climatic variability: The Middle to Upper Green River Formation, Uinta Basin, Utah date: 2022 words: 643 flesch: 17 summary: UGA 50:04 - Paleoenvironmental Reconstructions Along the Southern Margin of Eocene Lake Uinta During a Period of Climatic Variability: The Middle to Upper Green River Formation, Uinta Basin, Utah Off-Canvas Toggle Member Login Donate About Publications Geology of the Intermountain West Guidebooks UGA Geosites Special Publications UGA 28 Topical Papers Members Member Benefits Become a Member Resources Newsletter Meeting Minutes Geologic Road Signs Geology Links UGA Constitution Outreach Student Scholarship Fund Teacher of the Year Become a Sponsor UGA Sponsors & Affiliates Lehi Hintze Award Events Contact UGF About UGF Donate to UGF Off-Canvas Toggle About Publications Geology of the Intermountain West Guidebooks UGA Geosites Special Publications UGA 28 Topical Papers Members Member Benefits Become a Member Resources Newsletter Meeting Minutes Geologic Road Signs Geology Links UGA Constitution Outreach Student Scholarship Fund Teacher of the Year Become a Sponsor UGA Sponsors & Affiliates Lehi Hintze Award Events Contact UGF About UGF Donate to UGF Off-Canvas Toggle thisistheplace2.jpeg subpage1.jpeg subpage2.jpeg subpage3.jpeg UGA 50:04 - Paleoenvironmental Reconstructions Along the Southern Margin of Eocene Lake Uinta During a Period of Climatic Variability: The Middle to Upper Green River Formation, Uinta Basin, Utah Lauren P. Birgenheier - University of Utah, Department of Geology and Geophysics Leah C. Toms - Beach Energy DOI: https://doi.org/10.31711/ugap.v50i.108 Eocene Green River Formation suggests a variety of depositional environments that were subject to pulses of sediment and lake level fluctuations in the Uinta Basin. keywords: member; uga; ugf cache: geosites-108.htm plain text: geosites-108.txt item: #6 of 59 id: geosites-109 author: Brinkerhoff, Riley; McBride, John; Hudson, Sam; Sprinkel, Douglas; Harris, Ron; Rey, Kevin; Tingey, Eric title: Strain partitioning between ductile and brittle stratigraphy: Characterizing the Sand Wash Fault System, Uinta Basin, Utah date: 2022 words: 790 flesch: 38 summary: The high-resolution fault model, developed herein, is thus a good proxy for other complex fault zones in the Uinta Basin. Our model will be useful to oil and gas operators as they develop horizontal wells across this and other complex fault zones in the basin. keywords: fault; uga; ugf; zone cache: geosites-109.htm plain text: geosites-109.txt item: #7 of 59 id: geosites-110 author: Elson, Amy; Marshall, John; Whiteside, Jessica title: Controls on organic matter variation during deposition of the Mahogany Oil Shale Zone of the Parachute Creek Member, Green River Formation, Utah date: 2022 words: 711 flesch: 12 summary: Petrographic observations indicate highly variable amounts of terrestrial organic matter (spores, wood and plant debris), with the most abundant being amorphous organic material in thin organic-rich laminae. The organic-rich mudstones of the Mahogany Zone exhibit strong micro-scale heterogeneity, indicating complex controls on organic matter production and distribution. keywords: member; uga; ugf cache: geosites-110.htm plain text: geosites-110.txt item: #8 of 59 id: geosites-111 author: Tabet, David title: Boron in the strata and waters of the Eocene Green River and Uinta Formations, Uinta Basin, Utah date: 2022 words: 1016 flesch: 40 summary: The tributaries in northern part of the basin have lower boron contents because they are not in contact with the GRF, have less contact with the member B of the Uinta Formation, and are diluted by greater snow-melt runoff from the Uinta Mountains which bound the basin to the north. Utah has no limit on boron content in drinking water; however, for irrigation purposes a limit of 750 μg B/L (0.75 mg/L) has been established. keywords: boron; uga; uinta cache: geosites-111.htm plain text: geosites-111.txt item: #9 of 59 id: geosites-112 author: Schamel, Steven title: Sunnyside bitumen-impregnated sandstone reservoirs at Bruin Point, southwest Uinta Basin, Utah date: 2022 words: 714 flesch: 39 summary: Bruin Point is an erosional remnant of a structural-stratigraphic trap formed by the superposition of a subtle flexure on a thick stack of deltaiclittoral sandstones. The bituminous sandstones encompass an area greater than 600 square miles and hold an estimated 11.6 to 14.0 billion barrels of bitumen, but the net thickness of bituminous sandstone and the OOIP rarely exceed 70 feet and 80 thousand barrels per acre (MBO/ac), respectively. keywords: member; uga; ugf cache: geosites-112.htm plain text: geosites-112.txt item: #10 of 59 id: geosites-113 author: Dyer-Pietras, Kuwanna title: Spatial and temporal cycle variations in the Eocene Lacustrine Green River Formation, Piceance Creek Basin, Colorado date: 2022 words: 626 flesch: 23 summary: UGA 50:09 - Spatial and Temporal Cycle Variations in the Eocene Lacustrine Green River Formation, Piceance Creek Basin, Colorado Off-Canvas Toggle Member Login Donate About Publications Geology of the Intermountain West Guidebooks UGA Geosites Special Publications UGA 28 Topical Papers Members Member Benefits Become a Member Resources Newsletter Meeting Minutes Geologic Road Signs Geology Links UGA Constitution Outreach Student Scholarship Fund Teacher of the Year Become a Sponsor UGA Sponsors & Affiliates Lehi Hintze Award Events Contact UGF About UGF Donate to UGF Off-Canvas Toggle About Publications Geology of the Intermountain West Guidebooks UGA Geosites Special Publications UGA 28 Topical Papers Members Member Benefits Become a Member Resources Newsletter Meeting Minutes Geologic Road Signs Geology Links UGA Constitution Outreach Student Scholarship Fund Teacher of the Year Become a Sponsor UGA Sponsors & Affiliates Lehi Hintze Award Events Contact UGF About UGF Donate to UGF Off-Canvas Toggle thisistheplace2.jpeg subpage1.jpeg subpage2.jpeg subpage3.jpeg UGA 50:09 - Spatial and Temporal Cycle Variations in the Eocene Lacustrine Green River Formation, Piceance Creek Basin, Colorado Kuwanna Dyer-Pietras - Department of Geological Sciences, Binghamton University DOI:  In the center of the basin, lacustrine deposits contain bedded evaporites and kerogen-rich carbonate mudstone, whereas basin margin deposits contain alluvial sandstone, kerogen-poor mudstone, stromatolite, and mud cracks. keywords: basin; uga; ugf cache: geosites-113.htm plain text: geosites-113.txt item: #11 of 59 id: geosites-114 author: Boak, Jeremy; Wu, Tengfei; Birdwell, Justin title: Geochemical studies of the Green River Formation in the Piceance Basin, Colorado: I. Major, minor, and trace elements date: 2022 words: 845 flesch: 26 summary: Early in the history of Lake Uinta, the salinity may have been elevated first in the shallower marginal waters, due to increased evaporation, which then led to elevated salinity in the basin center through transport of saline density currents. Quantitative geochemical data for Green River oil shale from the Piceance Basin of Colorado were collected by inductively coupled plasma optical emission spectroscopy and mass spectrometry as part of this study. keywords: basin; member; uga; ugf cache: geosites-114.htm plain text: geosites-114.txt item: #12 of 59 id: geosites-115 author: Wu, Tengfei; Boak, Jeremy; Birdwell, Justin title: Geochemical studies of the Green River Formation in the Piceance Basin, Colorado: II. Chemofacies from hierarchical cluster analysis date: 2022 words: 690 flesch: 24 summary: Create an account Utah Geological Association P.O. Box 526356 Salt Lake City, UT 84152-0100  Facebook  YouTube © 2025 Utah Geological Society | Site by Third Sun MEMBER LOGIN Off-Canvas Toggle About Publications Geology of the Intermountain West Guidebooks UGA Geosites Special Publications UGA 28 Topical Papers Members Member Benefits Become a Member Resources Newsletter Meeting Minutes Geologic Road Signs Geology Links UGA Constitution Outreach Student Scholarship Fund Teacher of the Year Become a Sponsor UGA Sponsors & Affiliates Lehi Hintze Award Events Contact UGF About UGF Donate to UGF A close relationship between enrichment of redox sensitive elements, particularly As and Mo, and TOC is identified in the basin center. keywords: basin; uga; ugf cache: geosites-115.htm plain text: geosites-115.txt item: #13 of 59 id: geosites-116 author: Klonowski, Elizabeth; Lowenstein, Tim; Carroll, Alan; Smith, M. Elliot; Paperini, Matteo; Pietras, Jeffrey title: Recurring lacustrine depositional successions in the Wilkins Peak Member, Green River: The basin-center evaporite perspective Formation date: 2022 words: 601 flesch: -4 summary: Green River Formation: The Basin-Center Evaporite Perspective Off-Canvas Toggle Member Login Donate About Publications Geology of the Intermountain West Guidebooks UGA Geosites Special Publications UGA 28 Topical Papers Members Member Benefits Become a Member Resources Newsletter Meeting Minutes Geologic Road Signs Geology Links UGA Constitution Outreach Student Scholarship Fund Teacher of the Year Become a Sponsor UGA Sponsors & Affiliates Lehi Hintze Award Events Contact UGF About UGF Donate to UGF Off-Canvas Toggle About Publications Geology of the Intermountain West Guidebooks UGA Geosites Special Publications UGA 28 Topical Papers Members Member Benefits Become a Member Resources Newsletter Meeting Minutes Geologic Road Signs Geology Links UGA Constitution Outreach Student Scholarship Fund Teacher of the Year Become a Sponsor UGA Sponsors & Affiliates Lehi Hintze Award Events Contact UGF About UGF Donate to UGF Off-Canvas Toggle thisistheplace2.jpeg subpage1.jpeg subpage2.jpeg subpage3.jpeg UGA 50:12 - Recurring Lacustrine Depositional Successions in the Wilkins Peak Member, Green River Formation: The Basin-Center Evaporite Perspective Elizabeth M. Klonowski - Department of Geological Sciences and Environmental Studies, Binghamton University Tim K. Lowenstein - Department of Geological Sciences and Environmental Studies, Binghamton University Alan R. Carroll - Department of Geoscience, University of Wisconsin-Madison M. Elliot Smith - School of Earth Science and Environmental Sustainability, Northern Arizona University Matteo Paperini - Mine Engineering Dept., Solvay Chemicals, Inc. Jeffrey T. Pietras - Department of Geological Sciences and Environmental Studies, Binghamton University DOI: https://doi.org/10.31711/ugap.v50i.116 Abstract Mineralogy, petrographic textures, and sedimentary structures from the world’s largest trona deposit, the Wilkins Peak Member (WPM) of the early Eocene Green River Formation (GRF), Bridger subbasin, Wyoming, provide key data about depositional conditions and paleoenvironments. Based on observations of modern hypersaline lake environments, WPM evaporite deposition at the basin depocenter is interpreted to be controlled by inflow water composition and volume, evaporative concentration, and seasonally-driven lake temperature fluctuations, resulting in recurrent patterns in evaporite mineralogies and textures. keywords: geology; member; uga; ugf cache: geosites-116.htm plain text: geosites-116.txt item: #14 of 59 id: geosites-117 author: Tofte, Marshal; Carroll, Alan title: Spatiotemporal quantification of organic matter accumulation in the Eocene Green River Formation, Bridger Basin, Wyoming date: 2022 words: 693 flesch: 19 summary: The locus of CORG burial shifted north during upper Wilkins Peak Member deposition, coincident with a decrease in differential accommodation. Within the Bridger basin, burial of CORG was greatest in the south during initial Wilkins Peak Member deposition, reflecting greater rates of accommodation near the Uinta uplift. keywords: member; uga; ugf cache: geosites-117.htm plain text: geosites-117.txt item: #15 of 59 id: geosites-132 author: Chan, Marjorie; Oviatt, Charles; Baxter, Bonnie; Tikoff, Basil; Atwood, Genevieve title: The Holocene Great Salt Lake and Pleistocene Lake Bonneville System: Conserving our Geoheritage for Future Generations date: 2024 words: 5577 flesch: 45 summary: Utah Geological Survey Notes, January 2023, https://geology.utah.gov/map-pub/survey-notes/gsl- gunnison-cub-islands/ Currey, D.R., Atwood, G., Mabey, D.R., 1984, Major levels of Great Salt Lake and Lake Bonneville: 1 M.D. Vanden Berg, R. Ford, C. Frantz, H. Hurlow, K. Gunderson, G. Atwood, editors 2024 Utah Geological Association Publication 51 ABSTRACT The modern (Holocene-age) Great Salt Lake (GSL) and Pleistocene Lake Bonneville of the Bonneville Ba- sin (BB) together make a geosite (GSL-BB system) of exceptional scientific, cultural, aesthetic, and societal value. keywords: basin; bonneville; chan; figure; geoheritage; geological; gsl; lake; lake bonneville; salt; salt lake; system; utah cache: geosites-132.pdf plain text: geosites-132.txt item: #16 of 59 id: geosites-133 author: Oviatt, Charles title: Late Neogene and Quaternary Lacustrine History of the Great Salt Lake-Bonneville Basin date: 2024 words: 11038 flesch: 56 summary: By at least 15 Ma, lake basins had begun to form in the eastern Basin and Range Province (Patton and Lent, 1980; Taylor and Bright, 1987; Oaks and others, 1999; Bortz, 2002; Janecke and others, 2003; Long and others, 2006; McClellan and Smith, 2020). Based on limited data, the total length of time deep lakes existed in the basin is thought to be less than 10% of the past ~773 ka. keywords: basin; bonneville; core; cycles; eardley; figure; geological; gsl; history; lake; lake cycles; oviatt; river; salt; salt lake; utah; valley; water cache: geosites-133.pdf plain text: geosites-133.txt item: #17 of 59 id: geosites-134 author: Radwin, Mark; Bowen, Brenda title: Evolution of Great Salt Lake’s Exposed Lakebed (1984-2023): Variations in Sediment Composition, Water, and Vegetation from Landsat OLI and Sentinel MSI Satellite Reflectance Data date: 2024 words: 14528 flesch: 49 summary: A temporal model of Great Salt Lake water area is also included as a comparator for water-body detec- tion performance and as an additional source of data. Here, multispectral remote sensing data of the Great Salt Lake from 1984 to 2023 are used to assess the evolution of sediment types and sediment area, vegetation area, water area, and relative chlorophyll-a concentrations between the North Arm, South Arm (including the Farmington Bay), and Bear River Bay. keywords: area; arm; bay; crusts; data; doi; extent; figure; halite; lake; lake area; lakebed; lakebed area; landsat; north; north arm; river; salt lake; south; surface; utah; vegetation; water; water area cache: geosites-134.pdf plain text: geosites-134.txt item: #18 of 59 id: geosites-135 author: Rowland, Ryan; Freeman, Mike title: Record Low Water Surface Elevations at Great Salt Lake, Utah, 2021-2022 date: 2024 words: 8154 flesch: 53 summary: Daily mean water-surface elevation at USGS station 10010000 Great Salt Lake at Saltair Boat Harbor, Utah (Saltair gage), and USGS station 10010100 Great Salt Lake near Saline, Utah (Saline gage), 1985-2022 (U.S. Geologi- cal Survey, 2023). Benchmarks used to maintain vertical datum at U.S. Geological Survey Great Salt Lake gaging stations (U.S. Geological Survey, 2023). keywords: causeway; discharge; gage; lake; mean; record; salt; salt lake; saltair; south; survey; utah; water; wse cache: geosites-135.pdf plain text: geosites-135.txt item: #19 of 59 id: geosites-136 author: Wilcock, Laura; Frantz, Carie; Vanden Berg, Michael title: Use of remote imagery to map microbialite distribution at Great Salt Lake, Utah: Implications for microbialite exposure date: 2024 words: 12490 flesch: 41 summary: Pace, A., Bourillot, R., Bouton, A., Vennin, E., Ga- laup, S., Bundeleva, I., Patrier, P., Dupraz, C., Thomazo, C., Sansjofre, P., Yokoyama, Y., Fran- ceschi, M., Anguy, Y., Pigot, L., and others, 2016, Microbial and diagenetic steps leading to the min- eralisation of Great Salt Lake microbialites: Sci- entific Reports, v. 6, no. 1, p. 31495, doi: 10.1038/srep31495. This ushered in a new era of Great Salt Lake microbialite research in which the microbialites were investigated as contributors to the lake ecosystem (Wurtsbaugh, 2009; Belovsky and others, 2011; Wurtsbaugh and others, 2011) and as geobiologic curiosities (Pedone and Folk, 1996; Baskin, 2014; Pace and others, 2016; Lindsay and others, 2017). keywords: areas; arm; baskin; berg; doi; exposure; extent; figure; frantz; imagery; lake elevation; map; microbialite; north; reef; salt lake; south; utah; vanden cache: geosites-136.pdf plain text: geosites-136.txt item: #20 of 59 id: geosites-137 author: Paradis, Olivia; Corsetti, Frank; Bardsley, Audra; Hammond, Douglas; Berelson, William; Xu, Xiaomei; Walker, Jennifer; Celestian, Aaron title: Radiocarbon Chronology/Growth Rates of Ooids from Great Salt Lake, Utah date: 2024 words: 10423 flesch: 53 summary: In addition to their utility in understanding radial ooid formation, GSL ooids may be targets for understand- ing the history of GSL, which as a terminal lake with no outflow, is particularly sensitive to climatic shifts. The assumption of calcitic mineralogy in GSL ooids prevailed until Kahle (1974) demonstrated that GSL ooids are in fact arago- nite and their cortical fabric is depositional. keywords: 14c; ages; arm; arm ooids; bulk; carbon; growth; gsl; lake; north; ooids; radiocarbon; salt; salt lake; south; utah; water cache: geosites-137.pdf plain text: geosites-137.txt item: #21 of 59 id: geosites-138 author: Atwood, Genevieve; Wambeam, Tamara; Oviatt, Charles title: Shoreline superelevation, clues to coastal processes of Great Salt Lake date: 2024 words: 8981 flesch: 59 summary: The table relates high shoreline superelevation, at a de- tailed scale with maximum fetch and shore aspect. At South Point, high shoreline superelevation correlates visually with maximum fetch and shore aspects facing west and southwest. keywords: antelope; atwood; bay; evidence; fetch; figure; gilbert; gsl; island; lake; patterns; salt; shoreline superelevation; survey; utah; wave; wind cache: geosites-138.pdf plain text: geosites-138.txt item: #22 of 59 id: geosites-139 author: Smith, Ben; Mahon, Robert; Lincoln, Tyler; Hagen, Cedric; Olsen-Valdez, Juliana; Magyar, John; Trower, Elizabeth title: Wave dynamics and sediment transport in Great Salt Lake: A model-data comparison date: 2024 words: 9079 flesch: 44 summary: In this chapter, we present a year-long series of wave data collected from July 2021 through June 2022 and use these wave data to assess the performance of a US Army Corps of Engineers wave model previously used to estimate bed shear velocity and intermittency of sediment transport in Great Salt Lake (Smith and others, 2020). Nevertheless, because the Rohweder and others (2008) wave model performs relatively well at match- ing the modern wave data, we suggest that this model could be a useful tool to evaluate how different wind patterns and/or lake level in the past might better ex- plain the microbialite ridge orientations. keywords: buoy; cores; data; figure; gsl; lake; microbialite; miera; model; rock; salt; sediment; spit; transport; trower; utah; water; wave; wind cache: geosites-139.pdf plain text: geosites-139.txt item: #23 of 59 id: geosites-140 author: Downard, Becka title: Great Salt Lake wetland vegetation and what it tells us about environmental gradients, drought, and disturbance date: 2024 words: 12060 flesch: 39 summary: GSL wetland plant species are generally resistant to environmental disturbance because of the anatomical and physical adaptations that allow them to survive in dynamic wetland environments. Recall that GSL wetland condition is measured through the GSL-VMMI, a composite of three met- rics: cover of highly tolerant species and facultative wetland species and dicot species richness. keywords: condition; cover; disturbance; environmental; figure; fringe; gsl; gsl wetlands; lake; plant; playa; quality; risk; salt; soil; species; utah; vegetation; water; wetland; wetland condition; wetland species cache: geosites-140.pdf plain text: geosites-140.txt item: #24 of 59 id: geosites-141 author: Zamora, Hector; Inkenbrandt, Paul title: Estimate of groundwater flow and salinity contribution to the Great Salt Lake using groundwater levels and spatial analysis date: 2024 words: 9935 flesch: 49 summary: In addition to groundwater level data, well properties (latitude, lon- gitude, surface elevation, screen depth, and well depth) were also gathered where available. We provide the first systematic basin-wide assess- ment of groundwater levels in areas adjoining GSL to quantify groundwater contributions and their salt loading to the lake system. keywords: aquifer; area; basin; data; feet; figure; flow; groundwater; groundwater flow; gsl; lake; level; salinity; salt; salt lake; seepage; surface; table; utah; valley; year cache: geosites-141.pdf plain text: geosites-141.txt item: #25 of 59 id: geosites-142 author: Oaks, Robert; Jänecke, Susanne; Rittenour, Tammy; Erickson, Thad; Nelson, Michelle title: Implications and hydrographs for two Pre-Bonneville pluvial lakes and double geosols from 14 OSL-IRSL ages in Cache Valley, NE Bonneville Basin date: 2024 words: 14757 flesch: 58 summary: RESULTS Overview of Newton Hill Gravel Pit On the SE flank of Newton Hill, central Cache Valley, Utah (Figure 3), our ongoing studies have de- lineated the internal architecture of an east-plunging, nose-shaped compound spit deposited atop an east- sloping, eroded face of Little Valley gravel during the Cutler Dam and Bonneville lake cycles. Black dot marks site of ~143 ka OSL age (USU-2895) sampled within fine-grained Little Valley lake beds (Qlv) beneath a calcrete. keywords: age; basin; bonneville; cache; cache valley; cutler; dam; deposits; figure; geological; gravel; hill; lake; lake bonneville; little; newton; oaks; osl; oviatt; pit; utah; valley; valley lake cache: geosites-142.pdf plain text: geosites-142.txt item: #26 of 59 id: geosites-143 author: Bernau, Jeremiah; Bowen, Brenda; Lerback, Jory; Kipnis, Evan title: Observations of Decadal-Scale Brine Geochemical Change at the Bonneville Salt Flats date: 2024 words: 11958 flesch: 55 summary: Brine density measurements over time (~2000 data points). Seasonal varia- tions in brine density, as observed from monitoring well brines and brines extracted for potash produc- tion, indicate that samples collected during cooler and wetter winter to spring months are more likely to have depressed density measurements (Figure 6). keywords: aquifer; area; bonneville; bowen; brine; bsf; change; chemistry; density; extraction; figure; flats; groundwater; halite; measurements; salinity; salt; time; utah; water; wells cache: geosites-143.pdf plain text: geosites-143.txt item: #27 of 59 id: geosites-144 author: Lerback, Jory; Bowen, Brenda; Bagge, Sam; Heberer, Mikelia; Cocke, Ryan; Bricker, Hayley title: Bonneville basin critical zones: Spring chemistry and gastropod ecology in playa-margin wetlands date: 2024 words: 15737 flesch: 52 summary: this study SIRFER BL-P-T4-3 BL Shell Planorbella BL-Pond -3.08 - this study SIRFER BL-Spring-Shell-2019-1 BL Shell Melanoides BL-Spring -2.21 - Lerback and others, 2023 NOSAMS BL-Spring-Shell-2019-2 BL Shell Melanoides BL-Spring -2.26 - Lerback and others, 2023 NOSAMS BL-Spring-Shell-2019-3 BL Shell Melanoides BL-Spring - - Lerback and others, 2023 NOSAMS BL-Spring-Shell-2019-4 BL Shell Melanoides BL-Spring -3.08 - Lerback and others, 2023 NOSAMS BL-Pond-Shell-2019-1 BL Shell Melanoides BL-Pond -2.17 - Lerback and others, 2023 NOSAMS BL-Pond-Shell-2019-2 BL Shell Melanoides BL-Pond -2.09 - Lerback and others, 2023 NOSAMS BL-Pond-Shell-2019-3 BL Shell Melanoides BL-Pond -2.37 - Lerback and others, 2023 NOSAMS BL-Pond-Shell-2019-4 BL Shell Melanoides BL-Pond -2.14 - Lerback and others, 2023 NOSAMS BL-Lake-Shell-2018-1 BL Shell Melanoides BL-Lake -3.06 - Lerback and others, 2023 NOSAMS BL-Lake-Shell-2018-2 BL Shell Melanoides BL-Lake -2.85 - Lerback and others, 2023 NOSAMS BL-Lake-Shell-2018-3 BL Shell Melanoides BL-Lake -2.98 - Lerback and others, 2023 NOSAMS BL-Lake-Shell-2018-4 BL Shell Melanoides BL-Lake -3.89 - Lerback and others, 2023 NOSAMS HRS-Pond-Shell-2020-1 HRS Shell Pyrgulopsis HRS-Subsite-00 -5.18 - Lerback and others, 2023 NOSAMS HRS-Pond-Shell-2020-2 HRS Shell Pyrgulopsis HRS-Subsite-00 -4.43 - Lerback and others, 2023 NOSAMS HRS-Pond-Shell-2020-3 HRS Shell Pyrgulopsis HRS-Subsite-00 -4.77 - Lerback and others, 2023 NOSAMS HRS-Pond-Shell-2020-4 HRS Shell Pyrgulopsis HRS-Subsite-00 -4.79 - Lerback and others, 2023 NOSAMS BL-Spring-Shell-2020-5 BL Shell Pyrgulopsis BL-Spring -1.82 - Lerback and others, 2023 NOSAMS BL-Spring-Shell-2020-6 BL Shell Pyrgulopsis BL-Spring -1.97 - Lerback and others, 2023 NOSAMS BL-Spring-Shell-2020-7 BL Shell Pyrgulopsis BL-Spring -1.94 - Lerback and others, 2023 NOSAMS BL-Spring-Shell-2020-8 BL Shell Pyrgulopsis BL-Spring -1.83 - Lerback and others, 2023 NOSAMS BL-Pond-Sediment-2020-1 BL Sediment - BL-Pond -26.61 - Lerback and others, 2023 NOSAMS HRS-Pond-Sediment-2020-1 HRS Sediment - HRS-Subsite-00 -20.65 - Lerback and others, 2023 NOSAMS Appendix 4 . this study SIRFER BL-M-T6-4 BL Shell Succineidae BL-Marsh -5.18 -10.812 this study SIRFER BL-M-T6-5 BL Shell Succineidae BL-Marsh -6.49 -11.096 this study SIRFER BL-P-T5-8 BL Shell Melanoides BL-Pond -1.84 keywords: bl shell; bl water; gastropod; genera; hrs; hrs shell; hrs water; lake; lerback; melanoides bl; nosams bl; pond; pyrgulopsis bl; shallow; shell melanoides; shell pyrgulopsis; shells; sirfer; sirfer bl; spring; spring bl; study; succineidae bl; tryonia; water; δ18o cache: geosites-144.pdf plain text: geosites-144.txt item: #28 of 59 id: geosites-145 author: Bernau, Jeremiah; Bowen, Brenda; Oviatt, Charles; Clark, Don title: Great Salt Lake desert landscape change over multiple temporal scales: A field trip guide covering the Bonneville Salt Flats and Knolls Sand Dunes date: 2024 words: 11243 flesch: 61 summary: Access to Bonneville Salt Flats crust is limited seasonally by surface flooding. A schedule of Bonneville Salt Flats events is available at https://www.blm.gov/visit/bonneville-salt-flats. keywords: area; bernau; bonneville salt; bowen; change; crust; desert; figure; geological; gypsum; halite; lake desert; oviatt; pan; road; saline; salt; salt crust; salt flats; salt lake; surface; utah cache: geosites-145.pdf plain text: geosites-145.txt item: #29 of 59 id: geosites-46 author: Atwood, Genevieve; McGarry, Amanda; Alderman, Peg title: Ophir anticline, Tooele County—a 30-minute drive through 300 million years of bedrock date: 2019 words: 4991 flesch: 59 summary: The evidence can be unraveled by cross-cutting relationships illustrated in figure 8 – Geologic cross-section of Ophir anticline and in figure 9 – Geologic maps of Ophir Canyon and vicinity. Figure 10 summarizes the geologic history of Ophir Utah three ways: as millions of years, as traditional breaks of time with traditional geologic names, and as chapters of Utah’s geologic history. keywords: anticline; bedrock; canyon; figure; geological; mountains; ophir; ophir anticline; oquirrh; utah cache: geosites-46.pdf plain text: geosites-46.txt item: #30 of 59 id: geosites-47 author: Biek, Robert; Rowley, Peter title: Brian Head Peak, Iron County date: 2019 words: 6820 flesch: 56 summary: Th e Utah Geological Survey also maintains a list of geosites https://geology.utah.gov/apps/geosights/index.htm. UGA-Geosite-Biek-Brian-Head-Peak.indd Utah Geosites 2019 Utah Geological Association Publication 48 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors Robert F. Biek1 and Peter D. Rowley2 1Utah Geological Survey, P.O. Box 146100, Salt Lake City, UT 84114-6100, bobbiek@utah.gov 2Geologic Mapping Inc., P.O. Box 651, New Harmony, UT 84757 Cover Image: Th e type section of the Brian Head Formation (Tbh) is on the ridge just right of center (by the Tbh label). keywords: ash; basin; biek; brian; brian head; canyon; flow; formation; geological; great; head; peak; plateau; rowley; tuff; utah cache: geosites-47.pdf plain text: geosites-47.txt item: #31 of 59 id: geosites-50 author: Biek, Robert; Rowley, Peter title: Cedar Breaks National Monument, North View Overlook date: 2019 words: 5956 flesch: 55 summary: We thank the many authors for their geosite contributions, Utah Geological Association members who make annual UGA publications possible, and the American Association of Petroleum Geologists—Rocky Mountain Section Foundation for a generous grant for desktop publishing of these geosite papers. Th e Utah Geological Survey also maintains a list of geosites https://geology.utah.gov/apps/geosights/index.htm. keywords: biek; breaks; brian; cedar; claron; formation; geological; head; markagunt; monument; national; north; overlook; plateau; utah; view cache: geosites-50.pdf plain text: geosites-50.txt item: #32 of 59 id: geosites-51 author: Biek, Robert title: Hurricane Fault date: 2019 words: 7456 flesch: 60 summary: Biek, R.F., 2019, Hurricane fault, in Milligan, M., Biek, R.F., Inkenbrandt, P., and Nielsen, P., editors, Utah Geosites: Utah Geological Association Publication 48, 12 p., https://doi. org/10.31711/geosites.v1i1.51. At St. George, west of the Washington fault, rates average 0.2 feet (0.06 m) per thousand years; between the Washington fault and Hurricane fault, rates average 0.4 feet (0.11 m) per thousand years; and east of the Hurricane fault, rates average 1.25 feet (0.35 m) per thousand years. keywords: association; biek; canyon; fault; feet; figure; formation; geological; hurricane; hurricane fault; member; r.f; river; survey; utah; virgin; zone cache: geosites-51.pdf plain text: geosites-51.txt item: #33 of 59 id: geosites-52 author: Biek, Robert title: Virgin Anticline and Quail Creek Reservoir date: 2019 words: 4514 flesch: 56 summary: UGA-Geosite-Biek-Quail-Creek.indd Utah Geosites 2019 Utah Geological Association Publication 48 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors Robert F. Biek Utah Geological Survey, P.O. Box 146100, Salt Lake City, UT 84114-6100 bobbiek@utah.gov Cover Image: View north at a brightly colored hillside of Shnabkaib (TRms), upper red (TRmu), and Shinarump (TRcs) strata just north of Utah Highway 9, immediately south of Quail Creek State Park. We thank the many authors for their geosite contributions, Utah Geological Association members who make annual UGA publications possible, and the American Association of Petroleum Geologists—Rocky Mountain Section Foundation for a generous grant for desktop publishing of these geosite papers. keywords: biek; creek; figure; formation; geological; member; park; quail; r.f; state; utah cache: geosites-52.pdf plain text: geosites-52.txt item: #34 of 59 id: geosites-53 author: Biek, Robert title: Sevier Fault at Red Canyon date: 2019 words: 9130 flesch: 67 summary: Qafo Qaf2 Qacf Qac Qms Kwcs Tcw Qc Tbv Tbm Tm(Tbv) Kiu Qalo Tm(Td) Qc Tm(Ti) Qc Tbh Tm(Td) QcQc Tbh? Kw Qms Qc/Tcp Qc Km Qmt Qc Tl Qms Ksd Qbhpc Qms Ktu Qaly Qc Qat Kt Qms(Ktd) Kkl Kwcs Kwcg Qac Qafo Qaly Qafy Tcwl Tcp Tcw Km Tcwu KsjTcwm Qafo Qms Qap Qafy Ktd Qbhp2 Kwcs Taf Qbhp1 Qacf QTbx Qmtc QmsQac Qms Qgtou Kwcs Tbh Qca Qmtc Tcp Qac Qc/Tcp Qc/Tcp Qacf Tbml Qafy Qc Qms QalyKm Tcw Qat Tbh Qafy Kt Tbh Qms QTap Qmtc Qacf Qgtou Qc Qmt Ksjs Qc Qafy Ktd Ktd Qr Qac Tcp KsstQmt Kwcs Qms Qms Qac Qbhp2 Ksd Tcp Ksd Qmt Ksst Qgtou Qacfo Qbdv Qms Qafy Qc Qacf Qms Qafy Qmt Qms Qat Qgtu Jcp Kw Taf Tcp Qms Qed Tcp Tcwm Qafo2 QTap Qms Kwcs Tcwl Qat Qms Km Qblfc QcQc Qmtc Tcwu Qacf QTap Kt Ktd Qafy QacfTbh Km Tl Qgtou Ksj Tcwl Qc Ktu Qafy Qc/Tcp Qacf Qms Kt QacfKst QTbx Qafy Qacf Tcp Qac Qac Tcwl Kwcs Qacf Kk Tcw Taf Qc Jcp Qafo2 Qgtu Qc Tbh Qc Qms Qms Tcwm Qac Tcp Tcwl Qc/Tcw Qc Tl Tcw Qafo Qms Qac Qc/Tcp Qat Qac Qc Ktd Qac Qc/Tcp Kst Tcp Tl Tcwm Qafo Kwcg Qmt Qc Qc Qms Ksjs QacfQaly Qacf Qaly Qc/Tcp Jcp Qafo Tbh Qc Kt Tbh Kt KklQc Tbh Jcw Qms Qaf2 Qc Qaly QacfQbmk2 Kkl Tbh Tbh Qc Tcwm Jcx Qms Ksjs Tcp Qacf Qc Qms Qmsc Qms Qmtc Ktu Qmsc Qacf Tcwu Qgtu Qc/Tcp Qmsc Qaco Ti Tbh Tql Tcwl Qacf Qms Tbbm? Qafy Jcc Tbh Qac Tcw Qc Qc Tcp Qmsh Tcwm Qc/Tcp Qms Kcm Kwcs Ksd Tcp Qhd Kwcs Qacfo Ktu Tcp Ksj Qc Ksjs Qaly Tbh Qaly Qaly Tcp QTbx Qmt Ksjc Tcp TcwtKw Kst Jcw Qc Qat Tbh Kk Taf Qco Ksjc Qc QTbx Qc Qacf Qc Qbmk3 Tbh Qbmk2 Tbh Qat Qms? keywords: ksd; ksj; kwcs; qac; qac qac; qacf; qaf2; qafo; qafy; qafy qac; qaly; qaly qc; qaly qms; qap; qap qc; qat; qc qacf; qc qafo; qc qc; qc qms; qc qmtc; qc tbh; qc tcp; qc tm(td; qms; qms qafo; qms qms; qmtc; qmtc qms; taf; tbh; tbh qms; tcp; tcp qms; tcwl; tcwm; tm qc; tm(tbv; tm(ti; utah cache: geosites-53.pdf plain text: geosites-53.txt item: #35 of 59 id: geosites-54 author: Chidsey, Thomas, Jr.; Willis, Grant title: Landscape Arch, Delicate Arch, and Double Arch in Arches National Park, Southeastern Utah date: 2020 words: 6853 flesch: 62 summary: Chidsey, Jr., and G.C. Willis Landscape Arch, Delicate Arch, and Double Arch 3 INTRODUCTION Arches National Park in southeastern Utah (figure 1) has the great- est concentration of natural rock arches in the world. Rock arch development stages in Arches National Park (the order generally matches the outcrops from right to left in the photo below). keywords: arch; arches; feet; figure; landscape; member; national; park; rock; salt; sandstone; utah cache: geosites-54.pdf plain text: geosites-54.txt item: #36 of 59 id: geosites-55 author: Chidsey, Thomas; Eby, David; Sprinkel, Douglas title: A Breccia Pipe in the Deseret Limestone, South Flank of the Uinta Mountains, Northern Utah date: 2020 words: 4427 flesch: 53 summary: A Breccia Pipe in the Deseret Limestone, South Flank of the Uinta Mountains, Northern Utah 2 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors 2019 Utah Geological Association Publication 48 Utah Geosites 2019 Utah Geological Association Publication 48 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors Utah Geosites showcases some of Utah’s spectacular geology, both little-known localities and sites seen by visitors to Utah’s many national and state parks and monuments. 4 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors 2019 Utah Geological Association Publication 48 Thus, the hydrothermal breccia pipe and nearby features were selected as a geosite because they serve as a visible example of an oil and gas reservoir model for the Lisbon and other oil fields in the Paradox Basin (Eby and others, 2009). keywords: association; breccia; deseret; figure; geological; limestone; mississippian; pipe; uinta; utah cache: geosites-55.pdf plain text: geosites-55.txt item: #37 of 59 id: geosites-56 author: Chidsey, Thomas; Doelling, Hellmut title: Dead Horse Point, Southeastern Utah date: 2020 words: 10627 flesch: 60 summary: UGA-Geosite-Chidsey-Dead-Horse-Point.indd 2019 Utah Geological Association Publication 48 Utah Geosites 2019 Utah Geological Association Publication 48 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors Thomas C. Chidsey, Jr.1, and Hellmut H. Doelling2 (retired) 1Utah Geological Survey, PO Box 146100, Salt Lake City, Utah 84114-6100, tomchidsey@utah.gov 2Utah Geological Survey, 483 E. 200 S., Manti, Utah 84642 Cover Image: Panorama to the east-northeast from Dead Horse Point. Dead Horse Point, Southeastern Utah 2 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors 2019 Utah Geological Association Publication 48 Utah Geosites 2019 Utah Geological Association Publication 48 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors Utah Geosites showcases some of Utah’s spectacular geology, both little-known localities and sites seen by visitors to Utah’s many national and state parks and monuments. keywords: area; colorado; doelling; feet; figure; formation; geological; horse; horse point; member; paradox; pennsylvanian; point; river; rocks; salt; sandstone; survey; utah cache: geosites-56.pdf plain text: geosites-56.txt item: #38 of 59 id: geosites-57 author: Clark, Donald title: Northern Cedar Mountains Red Beds, Tooele County date: 2019 words: 2997 flesch: 75 summary: Northern Cedar Mountains Red Beds, Tooele County 2 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors 2019 Utah Geological Association Publication 48 Utah Geosites 2019 Utah Geological Association Publication 48 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors Utah Geosites showcases some of Utah’s spectacular geology, both little-known localities and sites seen by visitors to Utah’s many national and state parks and monuments. 4 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors 2019 Utah Geological Association Publication 48 Also of interest is the location of the red beds; these rocks are wedged between two thrust sheets of the Sevier fold-thrust belt (see, for example, Willis, 1999; Hintze and Kowallis, 2009, p. 68). keywords: b b; cedar; psl; utah cache: geosites-57.pdf plain text: geosites-57.txt item: #39 of 59 id: geosites-58 author: Kowallis, Bart; Wald, Laura title: Rock Canyon near Provo, Utah County: A Geologic Field Laboratory date: 2020 words: 12903 flesch: 70 summary: Core zone of Rock Canyon fold. Core zone of Rock Canyon fold. keywords: deposits; e s; fault; figure; formation; l e; limestone; mountains; peak; provo; quartzite; rock canyon; rocks; tintic; utah; wasatch cache: geosites-58.pdf plain text: geosites-58.txt item: #40 of 59 id: geosites-59 author: Loope, David; Kettler, Richard title: Rinded, Iron-Oxide Concretions in Navajo Sandstone Along the Trail to Upper Calf Creek Falls, Garfield County date: 2019 words: 3947 flesch: 58 summary: Dense piece of concretion rind that shows bedding (black arrow) and a central fracture (white arrow; See figure 9, part 3). First, they are cemented by iron oxide (Fe2O3, or Fe(OH)3); most other concretions are cemented by silica (SiO2), calcite (CaCO3), dolomite (CaMg(CO3)2), or siderite (FeCO3). keywords: concretions; figure; iron; loope; navajo; oxide; sandstone; siderite; utah cache: geosites-59.pdf plain text: geosites-59.txt item: #41 of 59 id: geosites-60 author: Loope, David title: Plant Root Systems Preserved in the Permian Cedar Mesa Sandstone at Moki Dugway, Southeastern Utah date: 2019 words: 3119 flesch: 56 summary: Cedar Mesa Sandstone outcrops along upper part of Moki Dugway where the rhizoliths in one of the Permian paleosols are best exposed. � e Utah Geological Survey also maintains a list of geosites https://geology.utah.gov/apps/geosights/index.htm. keywords: cedar; dugway; mesa; moki; sandstone; utah cache: geosites-60.pdf plain text: geosites-60.txt item: #42 of 59 id: geosites-61 author: Loope, David title: Cut, Fill, Repeat: Slot Canyons of Dry Fork, Kane County date: 2020 words: 3637 flesch: 67 summary: Suggested citation for this geosite: Loope, D.B., 2019, Cut, fi ll, repeat—slot canyons of Dry Fork, Kane County, in Milligan, M., Biek, R.F., Inkenbrandt, P., and Nielsen, P., editors, Utah Geosites: Utah Geological Associ- ation Publication 48, 8 p., https://doi.org/10.31711/geosites. v1i1.61. 8 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors 2019 Utah Geological Association Publication 48 19 m A B Figure 7. A. Mouth of Brimstone slot at its confluence with Dry Fork. keywords: carmel fm; fm navajo; kayenta fm; sandstone; slot; utah cache: geosites-61.pdf plain text: geosites-61.txt item: #43 of 59 id: geosites-62 author: Loope, David title: Hexagonal Fracture Patterns On Navajo Sandstone Crossbeds At Yellow Knolls, Washington County date: 2019 words: 3419 flesch: 61 summary: Hexagonal Fracture Patterns On Navajo Sandstone Crossbeds At Yellow Knolls, Washington County 2 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors 2019 Utah Geological Association Publication 48 Utah Geosites 2019 Utah Geological Association Publication 48 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors Utah Geosites showcases some of Utah’s spectacular geology, both little-known localities and sites seen by visitors to Utah’s many national and state parks and monuments. Suggested citation for this geosite: Loope, D.B., 2019, Hexagonal fracture patterns on Navajo Sand- stone crossbeds at Yellow Knolls, Washington County, in Mil- ligan, M., Biek, R.F., Inkenbrandt, P., and Nielsen, P., editors, Utah Geosites: Utah Geological Association Publication 48, 5 p., https://doi.org/10.31711/geosites.v1i1.62. keywords: g g; navajo; sandstone; utah; yellow cache: geosites-62.pdf plain text: geosites-62.txt item: #44 of 59 id: geosites-63 author: Potter-McIntyre, Sally title: Crystal Geyser: An Unusual Cold Spring System, Grand County date: 2019 words: 4490 flesch: 51 summary: Suggested citation for this geosite: Potter-McIntyre, S.L., 2019, Crystal Geyser—an unusual cold spring system, Grand County, in Milligan, M., Biek, R.F., Inkenbrandt, P., and Nielsen, P., editors, Utah Geosites: Utah Geological Association Publication 48, 6 p., https://doi. org/10.31711/geosites.v1i1.63. Crystal Geyser is a popular place for tourists, and it is not uncommon to see children playing in the spring. keywords: co2; crystal; crystal geyser; geological; geyser; mcintyre; potter; spring; utah; water cache: geosites-63.pdf plain text: geosites-63.txt item: #45 of 59 id: geosites-64 author: Spangler, Lawrence title: Ricks Spring date: 2019 words: 3741 flesch: 63 summary: UGA-Geosite-Spangler-Ricks-Spring.indd Utah Geosites 2019 Utah Geological Association Publication 48 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors Lawrence E. Spangler U.S. Geological Survey 2329 Orton Circle, West Valley City, Utah 84119 spangler@usgs.gov Cover Image: Ricks Spring rises along a nearly vertical normal fault in the Ordovician Garden City Formation. Suggested citation for this geosite: Spangler, L.E., 2019, Ricks Spring, in Milligan, M., Biek, R.F., Inkenbrandt, P., and Nielsen, P., editors, Utah Geosites: Utah Geological Association Publication 48, 6 p., https://doi. org/10.31711/geosites.v1i1.64. keywords: figure; flow; logan; ricks; river; spring; utah; water cache: geosites-64.pdf plain text: geosites-64.txt item: #46 of 59 id: geosites-65 author: Stanczyk, Anna; Moore, Jeffrey; Quirk, Brendon; Castleton, Jessica title: Paradise from Cataclysm: Zion Canyon’s Sentinel Landslide date: 2019 words: 4641 flesch: 59 summary: Th ese sediment layers are still visible today and are responsible for the remarkably fl at fl oor of upper Zion Canyon (Grater, 1945; Hamilton, 2014; Castleton and others, 2016). UGA-Geosite-Stanczyk-Sentinel-Landslide.indd Utah Geosites 2019 Utah Geological Association Publication 48 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors Anna M. Stanczyk1, Jeffrey R. Moore1, Brendon J. Quirk1, Jessica J. Castleton2 1University of Utah, Department of Geology & Geophysics, Frederick Albert Sutton Building, 115 S 1460 E, Room 383, Salt Lake City, UT 84112, anna.marie.stanczyk@gmail.com 2Utah Geological Survey, 1594 W North Temple, Salt Lake City, UT 84116 Cover Image: Looking up Zion Canyon from Mt. Spry. keywords: canyon; castleton; figure; lake; landslide; rock; sentinel; slide; utah; zion cache: geosites-65.pdf plain text: geosites-65.txt item: #47 of 59 id: geosites-67 author: Wheatley, David; Seiler, Winston; Chan, Marjorie title: The Wind-Swept Nautilus, Enigmatic Clastic Pipes, and Toadstool Landforms: Geologic Features of the Paria Plateau date: 2019 words: 6307 flesch: 54 summary: The Wind-Swept Nautilus, Enigmatic Clastic Pipes, and Toadstool Landforms: Geologic Features of the Paria Plateau 2 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors 2019 Utah Geological Association Publication 48 Utah Geosites 2019 Utah Geological Association Publication 48 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors Utah Geosites showcases some of Utah’s spectacular geology, both little-known localities and sites seen by visitors to Utah’s many national and state parks and monuments. Suggested citation for this geosite: Wheatley, D.F., Seiler, W.M., and Chan, M.A., 2019, Th e wind- swept nautilus, enigmatic clastic pipes, and toadstool land- forms—geologic features of the Paria Plateau, in Milligan, M., Biek, R.F., Inkenbrandt, P., and Nielsen, P., editors, Utah Geosites: Utah Geological Association Publication 48, 11 p., https://doi.org/10.31711/geosites.v1i1.67. keywords: association; carmel; chan; features; formation; geological; jurassic; nautilus; navajo; paria; pipes; plateau; sandstone; utah cache: geosites-67.pdf plain text: geosites-67.txt item: #48 of 59 id: geosites-74 author: Chidsey, Thomas; Anderson, Paul title: Ancient delta deposits in the Ivie Creek area, Ferron Sandstone member of the Mancos Shale, western San Rafael Swell, east-central Utah date: 2019 words: 8803 flesch: 54 summary: Ferron Sandstone parasequence sets. Ancient Delta Deposits in the Ivie Creek Area, Ferron Sandstone Member of the Mancos Shale, Western San Rafael Swell, East-Central Utah 2 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors 2019 Utah Geological Association Publication 48 keywords: area; creek; delta; deposits; facies; ferron; ferron sandstone; figure; ivie; ivie creek; kf-1; kf-2; parasequence; sandstone; utah cache: geosites-74.pdf plain text: geosites-74.txt item: #49 of 59 id: geosites-75 author: Chidsey, Thomas; Anderson, Paul title: Spectacular crinkled crust—A detachment fold train in the Carmel Formation, western San Rafael Swell, Utah date: 2019 words: 3352 flesch: 55 summary: Doelling, H.H., and Hylland, M.D., 2002, San Rafael Swell pro- posed as site of new national monument: Utah Geological Survey, Survey Notes, v. 34, no. 2, p. 9–11. Spectacular detachment fold train in the Winsor Member of the Middle Jurassic Carmel Formation in the Reed Wash area on the west-dipping flank of the San Rafael Swell; view north from I-70. keywords: detachment; figure; fold; rafael; san; swell; train; utah cache: geosites-75.pdf plain text: geosites-75.txt item: #50 of 59 id: geosites-76 author: Chidsey, Thomas; Doelling, Hellmut title: Green River overlook, Island in the Sky District, Canyonlands National Park, southeastern Utah date: 2020 words: 4772 flesch: 58 summary: In The Sky District, Canyonlands National Park, Southeastern Utah 2 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors 2019 Utah Geological Association Publication 48 4 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors 2019 Utah Geological Association Publication 48 The upper contact of the Organ Rock strata with the overlying White Rim Sandstone is sharp and conformable. keywords: figure; formation; green; jurassic; overlook; river; sandstone; utah; wingate cache: geosites-76.pdf plain text: geosites-76.txt item: #51 of 59 id: geosites-77 author: Anderson, Paul title: What you can discover on an ancient Cretaceous beach, a geosite in Emery County, Utah date: 2019 words: 5634 flesch: 74 summary: Unidentified plant fossil found in a boulder of the Kf-6 beach sand. Cover Image: Unidentifi ed plant fossil found in the Kf-6 beach sand. keywords: beach; coal; ferron; figure; kf-6; sandstone; sea; seaward; shoreline; shoreline beach cache: geosites-77.pdf plain text: geosites-77.txt item: #52 of 59 id: geosites-78 author: Boden, Taylor title: Independent gilsonite vein, Uintah County date: 2019 words: 3821 flesch: 55 summary: T. Boden Independent Gilsonite Vein, Uintah County 5 Fractures filled by gilsonite veins are large-scale hydraulic exten- sion features that resulted from the over pressurization of pore- space fluid in the organic-rich source beds in the Green River Formation (Verbeek and Grout, 1993). Gilsonite veins and mine workings around the Bonanza area can be observed along public roads but all mining takes place on private property having no pub- lic access. keywords: basin; bonanza; figure; formation; geological; gilsonite; independent; uinta; utah; veins cache: geosites-78.pdf plain text: geosites-78.txt item: #53 of 59 id: geosites-79 author: Ege, Carl title: Devils playground, Box Elder County date: 2019 words: 3290 flesch: 59 summary: Devils Playground is not your ordinary community play- ground, but a wonderland of granitic rock weathered into fantastic forms and weird shapes (figure 1). A combination of granitic rock, faulting, and weathering under a semiarid climate created favorable conditions for the creation of Devils Playground. keywords: bonneville; devils; figure; geological; lake; playground; rock; utah; weathering cache: geosites-79.pdf plain text: geosites-79.txt item: #54 of 59 id: geosites-80 author: Kettler, Richard; Loope, David title: The origin of Shinarump wonderstone, Hildale, Washington County date: 2019 words: 2855 flesch: 55 summary: Rhombic patches of iron oxide cement (circled) interpreted to be pseu- domorphs of iron oxide after siderite. The wonderstone pattern comprises thick bands of iron oxide mineralization that fills pore space (referred to as iron oxide cement or IOC) and more delicate bands of iron oxide mineralization that coats sand grains but does not fill pore space (referred to as iron oxide stain or IOS) keywords: cement; iii; iron; oxide; quarry; shinarump; siderite cache: geosites-80.pdf plain text: geosites-80.txt item: #55 of 59 id: geosites-88 author: Judge, Shelley; Pollock, Meagen; Williams, Michael; Schantz, Krysden; Baxstrom, Kelli; Burden, Kyle; Matesich, Cam; Randall, Emily; Patzkowsky, Samuel; Sims, Whitney; Cary, William; Peppers, Matt; Thompson, Addison; Wilch, Thomas title: Young volcanism in Millard County: Ice Springs volcanic field date: 2019 words: 8607 flesch: 60 summary: Our sampling focused on the boundaries between lava flow fields, the area immediately west of the cones where most of the flows originate, and the interior of the lava flows, which are less accessible and represented a gap in the existing data set (table 2). Although ISVF lava flows appear similar to the eye, they can be separated into two groups based on their geochemical composi- tions (figure 4). keywords: black; bonneville; crater; crescent; desert; field; flows; geological; ice; isvf; lake; lava; miter; rock; springs; utah; volcanic cache: geosites-88.pdf plain text: geosites-88.txt item: #56 of 59 id: geosites-90 author: Little, William; Little, David title: Field localities in the Book Cliffs to understand sequence stratigraphic concepts date: 2019 words: 16802 flesch: 51 summary: Particular emphasis is placed on the nature of sequence stratigraphic surfaces, the character of stacking patterns, lateral changes in facies association within a sequence, the special case of incised channel fill deposits above a sequence bound- ary, and recognition of small-scale (fourth-order) sequences within the larger-scale third-order sequence. Incised-channel fill in Thompson Canyon showing sequence stratigraphic surfaces and systems tracts. keywords: blackhawk; canyon; channel; cliffs; deposits; east; facies; figure; locality; member; north; panther; parasequence; road; sandstone; sequence; shoreface; spring; surface; tongue; upper; utah cache: geosites-90.pdf plain text: geosites-90.txt item: #57 of 59 id: geosites-93 author: Biek, Robert title: Silver Reef Mining District date: 2021 words: 9085 flesch: 54 summary: Proctor, P.D., and Shirts, M.A., 1991, Silver, sinners and saints—a history of old Silver Reef, Utah: Provo, Utah, Paulmar, Inc., 224 p. Schaeffer, B., and Dunkle, D.H., 1950, A semionotid fish from the Chinle Formation, with consideration of its relationships: American Museum Novitates, no. 1457, p. 1–29. UGA-Geosite-Biek-Silver-Reef.indd Utah Geosites 2019 Utah Geological Association Publication 48 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors Robert F. Biek1 and J. Chris Rohrer2 1Utah Geological Survey, Salt Lake City, UT, bobbiek@utah.gov 2Utah Division of Oil, Gas and Mining, Abandoned Mine Reclamation Program, Salt Lake City, UT COVER IMAGE: View northeast to the Silver Reef mining district. keywords: anticline; association; biek; district; east; figure; formation; geological; member; mining; mining district; proctor; r.f; reef; reef mining; sandstone; silver; silver reef; springdale; utah cache: geosites-93.pdf plain text: geosites-93.txt item: #58 of 59 id: geosites-95 author: Sprinkel, Douglas title: The Palisades at Sheep Creek Canyon Geological Area: A Geosite in the Uinta Mountains, Daggett County, Utah date: 2022 words: 5958 flesch: 56 summary: 8 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors 2019 Utah Geological Association Publication 48 The Uinta fault propagates at depth and resurfaces west of the Sheep Creek Canyon Geological Area where much of the Red Pine Shale is faulted out. Utah Geosites 2019 Utah Geological Association Publication 48 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors Douglas A. Sprinkel Utah Geological Survey, P.O. Box 146100, Salt Lake City, Utah 84116 douglassprinkel@utah.gov The Palisades at Sheep Creek Canyon Geological Area—A Geosite in the Uinta Mountains, Daggett County, Utah Cover Image: Panoramic view of the Palisades as seen from the Sheep Creek Canyon Geological Area overlook. keywords: area; canyon; creek; geological; limestone; mountains; palisades; sheep; sprinkel; uinta; utah cache: geosites-95.pdf plain text: geosites-95.txt item: #59 of 59 id: geosites-99 author: Hayden, Janice title: Inverted topography in St. George, Washington County, Utah date: 2022 words: 8541 flesch: 56 summary: 2 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors 2019 Utah Geological Association Publication 48 Utah Geosites 2019 Utah Geological Association Publication 48 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors Utah Geosites showcases some of Utah’s spectacular geology, both little-known localities and sites seen by visitors to Utah’s many national and state parks and monuments. 4 M. Milligan, R.F. Biek, P. Inkenbrandt, and P. Nielsen, editors 2019 Utah Geological Association Publication 48 LOCATION Traveling on I-15, use Exit 8 to access St. George Boulevard. keywords: ^cp; b b; black; flow; formation; geological; george; jkm; jks; jurassic; lava; qac; qag; qat3; ridge; utah; west cache: geosites-99.pdf plain text: geosites-99.txt