Brachiopod zonation and age of the Permian Kapp Starostin Formation (Central Spitsbergen) KOJI NAKAMURA, GAKW KIMURA AND T H O R E S. WINSNES Nakamura, K., Kimura, G . & Winsnes, T. S. 1987: Brachiopod zonation and age of the Permian Kapp Starostin Formation (Central Spitsbergen). Polar Research 5 n.s., 207-219. This study has defined five brachiopod assemblage zones within the Permian Kapp Starostin Formation of Festningen. Central West Spitsbergen. They are designated as the Horridonin timanica zone. the Waagenoconcha sp, A (Gobbett 1964) zone, the Megousia weyprechri zone, the Pterospirifer ulatiis zone and the Haydenella wilczeki zone in ascending order. Only the lower three zones are recognized in thc same formation of Sveltihel. The first zone, which is exactly equivalent to the ’Spirifer Limestone’ as well as the Varingcn Member of the Kapp Starostin Formation, is probably Kungurian in age. The last zone. situated near the uppermost portion of the Hovtinden Member, may possibly have a brachiopod assemblage matching that of the Cvclolohus-bearing beds of the Foldvik Creek Formation in Central East Greenland. Consequently. the uppermost heds of the Kapp Starostin Formation are chronologically dated as late Permian, most probably as Dzhulfian of the Tethys Province. Koji Nakamrtra, Deparrmenr of G e o l o g y arid Mineralogy. Fucuiy of Science, Hokkaido University. Siipporo. Japan; G a k u Kimura. G e o l o g y Laborarory. Faculty of Educarion. Kngawn U n i i i e r s i r ~ . Takamalsu. Jupan: Tliore S. Winsnes. Norsk Polarinsrirutr, Rolfstnngveien 12. 1330 O s l o Lufthaon. N o r w a y : January 1987 (revised August 1987). It has been well known for a long time that there is a debate among Permian workers over the age of the ‘Productus Chertstones’, ‘Brachiopod Cherts’ and ‘Spirifer Limestone’ in the Svalbard Archipelago, in spite of the presence of rich and well-preserved megafossils including brachio- pods, bryozoans, corals and sponges. This unsatis- factory situation is attributed to the complete lack of ammonoids or fusulinids, which are more suitable for age determination, in those beds. The name Tempelfjorden Group was pro- posed to replace the old terms of ‘Brachiopod Cherts’ and ‘Spirifer Limestone’, and the name Kapp Starostin Formation was used rather restrictedly by Cutbill & Challinor (1965) for the marine Permian distributed in the Spitsbergen trough area. The most recent comments on the age of the uppermost beds of the Tempelfjorden Group were given by Steel & Worsley (1984) as: ‘There remains much uncertainty as to how far sequences assigned to the group extended into the Late Permian and opinions vary considerably: we indicate a ?Kazanian age for the youngest beds and hope that studies of palynomorphs, con- odonts and foraminifers now in progress may elucidate this problem’. On the other hand, vari- ous ages have also been suggested since the 1900s for the lower border of the Tempelfjorden Group or the Kapp Starostin Formation. In short, these two problems seem to be debatable even today. In 1984, a cooperative study between Norsk Polarinstitutt and Hokkaido University, Japan was undertaken in West Central Spitsbergen, the main objective of which was to obtain detailed stratigraphical and palaeontological information about the Permian and the Permian-Triassic boundary. For these purposes, two stratigraphical sections of the Kapp Starostin Formation exposed along the south side of Isfjorden were measured both at Festningen and at Sveltihel, the latter being located about 60 km east of the former (Fig. 1). Study in Japan led to the recognition that the brachiopod assemblage of the upper part of the Kapp Starostin Formation was allied, as a whole, to that of the Upper Permian Foldvik Creek For- mation in Central East Greenland. As a result, the more or less precise age of the uppermost beds of the Kapp Starostin Formation could be deduced. Stratigraphy As stated earlier, the name Tempelfjorden Group was introduced by Cutbill & Challinor (1965) 208 K. Nakamura, G. Kimura & T. S . Winsnes Fig. I . Map 01 w u t h c r n Spir,bcrscn 5 h o w n g t h c l o c a t i o n of Festningun a n d Svrltihul for marine late Permian sequences exposed i n Svalbard. According to them. this group com- prised the Kapp Starostin Formation in the Spits- bergen trough area, the Tokrossaya Formation on S ~ r k a p p ~ y a and 'Spirifer Limestone' on Bjorn- oya. T h e name Miseryfjellet Formation was later given to the 'Spirifer Limestone' on B j d r n ~ y a by Worsley & Edwards (1976). T h e type section designated by Cutbill & Challinor for the Kapp Starostin Formation was Festningen. Central West Spitsbergen. A three-fold division of the Kapp Starostin Formation was further proposed by them. i n which they delineated in ascending order the Vbringen, Svenskeegga and Hovtinden Members. A . Festrlirlgen section The schematic section simplified from the detailed column measured by the Japanese members at Festningen is given in Fig. 7 . The Kapp Starostin Formation is about 400 m thick and can be classi- fied into 12 lithologic w i t s . At its base the VcWin- gen Member, formerly called 'Spirifer Limestone' or 'Limestone A' ( G e e et al. 1952), is composed of only o n e lithologic unit (Unit 1) which is made u p of white coarse limestones in the lower part and grey marly limestones in the upper, and is dominated by brachiopod fossils and accom- panied by a lesser number of bryozoans, corals and so o n . The Voringen Member is overlain by the Svenskeegga M e m b e r , which contains Units 2 , 3 , 4 and 5. A m o n g these, Units 2 4 are made u p of clastic rocks, such as sandstone, shale and chertstone, and a r e very poor in organic remains. Unit 2 is characterized by the inclusion of cal- careous nodules at several horizons. T h e upper- most Unit 5 consists mostly of light-grey bedded limestones and is prolific in megafossils, such as brachiopods, corals, bryozoans and sponges. T h e Hovtinden Member may b e better sub- divided into Lower, Middle and Upper Beds. Units 6 8 a r e included in the Lower Bed. of which Units 6 and 7 consist lithologically of shales and chertstones, while Unit 8 consists of limestone. Brachiopods were collected from several horizons of Units 6 and 7. Unit 8 is marked by a sudden increase of large brachiopods and bryozoans, to which corals and sponges are associated. The Middle Bed is composed of Unit 9, represented by shales with a few brachiopods and pelecypods in its upper part. and Unit 10, consisting mostly of limestones rich in brachiopods and bryozoans. The Upper Bed comprises Units 11 and 12 and is composed mostly of shales. A glauconitic sand- stone layer was observed in Unit 11, while some nodular limestone lenses are intercalated in Unit 12. Brachiopods and corals were found in Unit 1 1 . and some sponge remains were collected from the uppermost beds of Unit 12. B . Sueltihel section The Kapp Starostin Formation outcrop a t Svelt- ihel was briefly described by Gobbett (1964) and by Major & Nagy (1972). T h e formation measured about 340 m in thickness and was litho- logically divided into 11 units. as shown in Fig. 3. The VQringen Member, corresponding to Unit 1, is composed mostly of limestones and sandy limestones. and it yielded numerous brachiopods together with some bryozoans, corals and sponges. as at Festningen. T h e Svenskeegga Member is represented by Units 2, 3 and the lower half of Unit 4, all of which are made up of i T e m p e l f j o r d e n G r o u p F o r m a t i o n K a P P S t a r o s t i n h 0 0 w 0 0 N D 0 ? , I HO RI ZO N 0 0 0 1 H o rr id o n id ti m a n ic a ST U C K EN B ER G 2 H o rr id o n ia g r a n u li fe r a (T O U L A ) 3 C h a o ie ll a n e o in fl a ta (L IC H A FS W ) 4 M u iw o o d ia m a m a ta (K EY SE RL IN G) 5 N e o s p ir if e r g ro n w a ll i D U N BA R 6 d n e m n a r ia p se u d o h o rr id a (W IM AN ) 7 S p ir if e r e ll a d ra sc h e i (T O U LA ) 8 M u iw o o d ia d u p le x (W IM A N ) 9 W a a q en o co n ch a w in n n i SA R Y TC H EV A 1 0 W a a ye n o co n ch a sp . A (G D B B E T T ) 1 1 C le io th y ri d in a p e c ti n if e r a (D ‘ O R B IG N Y ) 1 2 C le io th y ri d in a k o tl u k o v i ST E P A N O V 1 3 U c h a re w ia s p it sb e rg ia n a G O B B ET T 1 4 N e o s p ir if e r s tr io -p a ra d o x u s (T O U LA ) 1 5 W a a g en o co n ch a p a y e ri (T O U L A ) 1 6 M e y o u si a w e y p re c h ti (T O U L A ) 17 S tr e p to rh y n c h u s k e m p e i A N D ER SS O N 18 M u ir w o o d ia y re e n la n d ic a D U N BA R 1 9 S te p a n o v ie ll a c u rv a ta (T O LM A C H EV ) 20 L ic h a re w ia w im n i W B B E T T 2 1 T h u le p ro d u c tu s c r a s s a u r it u s SA R Y TC H EV A a nd W A TE R H O U SE 22 P te r o s p ir if e r a la tu s (S C H L O T H E IM ) 2 3 P le u ro h o rr id o n ia s c o re sb y e n si s D U N BA R 24 C h o r is ti te s s m d e rb e rq h i D U N BA R 25 O d o n to sp ir if e r m ir a b il is D U N BA R 26 L io s o te ll a sp it zb e rg ia n a (T 0U L. A ) 27 L ic h a re w ia sp . 28 P a e c k e lm a n n ia to u la i D U N BA R 29 K o c h ip ro d u c tu s p le x ic o s ta tu s D U N BA R 30 M eg o u si a y a k u ti c a (L IC HA RE W) 31 H a y d e n e ll a g e fo e n s is (L IC H A R E W ) 3 2 H a y d e n e ll a w il c z e k i (T O U LA ) Ho vt in de n M- b. 1 Mi dd le I U p p er Lo we r /# ri n g e n M b. Sv en sk ee gg a M -b . M e g o u sl a P te r o s p ir H a yd en e lWaage noconC hasp’* ‘. I W e v D re c h ti 7.. I al a tu s ZI w il c . tl B Sha le 0 Sand st on e Ch er ts ta ne N o d u le 1 7 18 20 2 1 2 8 30 3 1 .’ 32 I F ig . 2 . R an ge c ha rt o f th e br ac hi op od s of t he K ap p St ar os ti n Fo rm at io n at F e st n in g e n , C cn tr al W cs t Sp it sb er ge n T e m p e l f j o r d e n G r o u p K a P P S t a r o s t i 11 F o r m a t i o n ' \ \ \ - \ ', ' \ H O R I Z ON 1 Y a k o v le v ia i m p re ss a (T O U L A ) 2 H o rr id o n ia ti m a n ic a S T U C K E N B E R G 3 H o rr id o n ia q ra n u li fe ra (T O U L A ) 4 W a a g en o co n ch a i r q in a e ( ST U C K E N B E R G ) 5 C h a o ie ll a n e o in fl a ta (L IC H A R E W ) 6 N e o sp ir if e r q rd n w a ll i D U N B A R 7 S p ir if e r e ll a p o la r is W IM A K 8 d th y r is a m d ru p i D U N B A R 9 C a n c ri n e ll a te n u is si m a G O B B E T T 10 C a n c ri n e ll a sp . 1 1 C le io th y ri d in a p e c ti n if e r a (D 'O R B IG N Y ) 1 2 A n em o n a ri a p se u d o h o rr id a (W IM AN ) 1 3 W a a q en o co n ch a s p . 1 4 P a e c k e lm a n n e ll a s p . 1 5 C le io th y ri d in a k o tl u k o v i ST E PA N O V 1 6 L ic h a re w ia c fr . sp it sb e rq ia n a G O B B E T T 1 7 S p ir if e r e ll a s a ra n a e (V E R N E U IL ) 18 A n id a n th u s a a q a rd i (T O U L A ) 1 9 N e o sp ir if e r c fr . st ri o -p a ra d o x u s (T O U LA ) 2 0 M eq o u si a w e y p re c h ti (T O U L A ) 2 1 K o c h ip ro d u c tu s p le x ic o s ta tu s D U N B A R 22 L io s o te ll a d e li c a tu la D LJ N BA R 2 3 K ro to v ia sp . 24 N e o sp ir if e r s? . 25 L in g u la fr e b o ld i G O B B E T T N w 0 0 0 0 P r' Iw / c I i n rn M b. 1 H o v ti n d e n M b* I L o w e r V d ri n g e n M b. S v e n sk e e g g a I I L im e s to n e S h a le 1-1 C o n g lo m e ra te 1 1 10 9 iL 16 17 18 L 19 20 i M id d le - U p p e r eq ou sih ---- 7 "'I 23 2 5 2 4 A F ig . 3 . R an ge c ha rt o f th e br ac hi op od s o f th e K ap p St ar os ti n F or m at io n at S ve lt ih el . C en tr al S pi ts be rg en . Brachiopod zonation 211 The Horridonia timanica Zone is the lowest zone, characterized particularly by the abundance of productoid brachiopods including Horridonia timanica, H . granulifera, Yakovleuia impressa, Waagenoconcha irginae, Muirwoodia mammata, and Chaoiella neoinflata. Other notable species are Neospirifer gron walli, Spiriferella polaris and S. draschei. The absence of Yakouleuia impressa at Festningen is noteworthy. This may be due to environmental control. The Waagenoconcha sp. A (Gobbett) Zone is established with the vertical distribution of the named species from Unit 4 to the lower half of Unit 7 at Festningen. Other diagnostic species of this zone are Muirwoodia duplex, Waagenoconcha wimani and Cleiothy- ridina kotlukoui. Special attention should be paid to the first appearance of a characteristic late Permian genus Licharewia in the lower part of the equivalent of this zone at Sveltihel. The Megousia weyprechti Zone is clearly delineated both at Festningen and Sveltihel. Megousia weyprechti, Waagenoconcha payeri, Muirwoodia greenland- ica, Stepanoviella curuata, Licharewia wimani, Streptorhynchus kempei, and Thuleproductus crassauritus are confined to this zone, as far as our collection is concerned. Gobbett (1964). how- ever, described Streptorhynchus kempei from the ‘Spirifer Limestone’ of Spitsbergen. The Ptero- spiriferalatus Zone is identified only at Festningen and is characterized by the following species: Pterospirifer alatus, Pleurohorridonia scoresby- ensis, Choristites sdderberghi, Odontospirifer mirabilis, Liosotella spitsbergiana, and Paeckelmannia toulari. Several species from the Megousia weyprechti and Pterospirifer alatus Zones are common to those described from the Foldvik Creek Formation in Central East Green- land. The Haydenella wilczeki Zone lies within the uppermost zone, and diagnostic species of this zone are Haydenella wilczeki and H . gefoensis. This zone has been recognized only at Festningen. There may be several possible reasons for the remarkable stratigraphical changes in brachiopod assemblage recognized within the Kapp Starostin Formation. Malkowski & Hoffman (1979) sug- gested that the presence of some changes in rela- tive water depth probably originated from the sea level change during the interval of deposition of the Kapp Starostin Formation, based on the analysis of the lithofacies and biofacies. This seems to be one of the reasons for the above mentioned changes of the brachiopods. It is noteworthy, however, that the same bio- various kinds of clastic rocks. Brachiopods were only found in Unit 4. All beds from the upper half of Unit 4 to Unit 11 may be included in the Hovtinden Member, and they are mostly com- posed of altered cherts with thin limestone as well as shale layers, except for the uppermost Unit 11 represented by glauconitic sandstones. Amongst these units, Units 5 and 6 contain several layers yielding brachiopod remains. Brachiopod zonation Stepanov (1957) considered that the brachiopod fauna of the whole ‘Brachiopod Cherts’ repre- sented only one period, and he proposed a Sval- bardian Stage for them. Gobbett (1964) basically followed Stepanov’s view in this and wrote: ‘The brachiopods described by Frebold (1937) from 23 horizons facilitate a three-fold division of the section (Forbes et al. 1958). However, these three groups of species are based on collections which are small and poorly-preserved in comparison with those from inner Isfjorden. Extensive col- lecting from the Brachiopod Chert, including the Spirifer Limestone, shows that the brachiopod fauna of this formation is essentially uniform.’ According to our own examination, however, brachiopod assemblages vary considerably from horizon to horizon, apart from the presence of a few long-ranging species, as shown in Fig. 2. So we support Frebold (1937). Most of the brachio- pod species collected from the Voringen Member (Unit 1) are of early Permian forms, while late Permian ones are enumerated in Unit 5 of the Svenskeegga Member and in Units 8, 10 and 11 belonging to the Hovtinden Member. Five brachiopod zones are recognized within the Kapp Starostin Formation of Festningen as the Hor- ridonia tirnanica Zone. the Waagenoconcha sp. A (Gobbett 1964) Zone, the Megousia weyprechti Zone, the Pterospirifer alatus Zone and the Hay- denella wilczeki Zone from old to young, on the basis of the vertical distribution of brachiopod species. The Horridonia timanica and Megousia wey- prechti Zones are also recognized at Sveltihel (Fig. 3). The occurrence of Cleiothyridina kot- lukovi and Anemonaria pseudohorrida in Unit 4 and its stratigraphical position at Sveltihel strongly suggest that this unit may correspond to Unit 5, the lower part of the Waagenoconcha sp. A Zone at Festningen (Fig. 4). 212 K . Nakamura, G. Kimura d T . S. Winsnes 300 ! O O 100 0 r; s C M C .r( !+ 3 . . , \ . -.----- stratigraphical relations in brachiopod assem- blage are basically traceable i n the counterparts of the Kapp Starostin Formation in Central East Greenland, specifically in the Foldvik Creek For- mation. and in Ellesmere Island, as well as in the Assistance and Trold Fiord Formations (Liao pers. comm. 1986). This means that the vertical changes of brachiopod assemblages in the Kapp F i g . 1. Correlation ot t h e hrarhiopod zones between Fest ninge n m d Svel t i hel, Starostin Formation are not locally restricted only to the Spitsbergen trough a r e a , but a r e also extended to the other parts of the Boreal Sea areas. Therefore, the brachiopod zonation pre- sented here undoubtedly has a chronostrati- graphical significance and has a n effect on correlation between the Permian sequences dis- tributed in the Boreal Sea areas. Brachiqvod zonation 213 Correlation with East Greenland The Tethyan Permian sequences usually contain abundant ammonoids, fusulinids, conodonts and brachiopods that are useful for international cor- relation and age-determination. So a correlation of the Kapp Starostin Formation with rocks of the Tethys could be expected. At present, however, this is impossible with any certainty using palaeontological means. There are two major reasons for this difficulty: (1) neither ammonoids nor fusulinids have been discovered in the Kapp Starostin Formation, and the occur- rence of conodonts is rare and confined to the Voringen Member, which comprises the lowest beds of the formation: (2) the brachiopod fauna in the Kapp Starostin Formation has very little similarity to corresponding faunas in the Tethys. Nevertheless, we have a reasonably satisfactory method by which the relative age of the Kapp Starostin Formation may be determined. This relies upon brachiopod correlation of the Kapp Starostin Formation with the more precisely aged Upper Permian of Greenland, already dated by the ammonoid Godthatihites kullingi. Gobbett (1964) argued that the Permian of Central East Greenland belonged to the upper- most part of the Permian and was thus con- siderably younger than the Svalbardian, which was actually represented by the ‘Spirifer Lime- stone’ and ‘Brachiopod Cherts’ (now the Kapp Starostin Formation). We do not accept this, but propose that the upper half of the Hovtinden Member of the Kapp Starostin Formation is mostly contemporaneous with the Foldvik Creek Formation in Central East Greenland, while the Voringen Member of the formation agrees in age with the upper part of the Upper Marine Group (from G-300 to H-119) of Northeast Greenland, based on the high degree of similarity of brachiopods. As far as the brachiopods from East Greenland are concerned. n o new systematic contributions have been made since Dr. Dunbar’s papers appeared in 1955 and 1962. Therefore, we are now obliged to reproduce four old sections pro- vided with brachiopod information, in order to discuss correlations between Spitsbergen and Greenland (Fig. 5 ) . One of them is from Amdrup Land of Northeast Greenland (Dunbar 1962), while the remaining three are from Scoresby Land, Kap Stosch, and Clavering 8 of Central East Greenland (Maync 1942; Dunbar 1955). The upper part of the Upper Marine Group (now known as Mallemuk Mountain Group) of North- east Greenland roughly corresponds to the Hor- ridonia timanica Zone (‘Spirifer Limestone’) of Spitsbergen, based on the mutual occurrences of some diagnostic species, notably Yakouleuia impressa, Athyris amdrupi, Neospirifer gronwalli, Chaoiella neoinflata, and Horridonia granulifera. The upper limit of this group might be cut by the present topographical surface, consequently the equivalent beds to the upper half of the Kapp Starostin Formation are not presented in this area. As a matter of fact, no definite late Permian faunal elements have been found in Northeast Greenland, although HBkansson & Stemmerik (1984) suggested the presence of a highly diverse late Permian fauna in Peary Land. In Central East Greenland the marine beds of the Foldvik Creek Formation rest on non-marine beds or directly on metamorphic basement and are believed to be late Permian in age. on account of the occurrence of an ammonoid genus G o d t - haabites in their upper part. The formation is composed of limestones, dolomites. ‘Productus Limestone’, Martinia limestone or shale, Posi- donia shale. in addition to gypsum and red con- glomerate beds. Even though rapid lateral changes in lithofacies are characteristic and the marine members are in part intertonguing and coeval, two brachiopod zones can be strati- graphically discriminated within this formation, that is, lower Fossil I Zone and upper Fossil I1 Zone. The brachiopods found in those two zones justify a firm correlation of the Fossil I Zone and the Fossil I1 Zone to the upper part of the Megousia weyprechti Zone and the Pterospirifer alatus Zone of Spitsbergen, respectively. The Fos- sil I Zone in Greenland and the upper part of the Megousia weyprechti Zone in Spitsbergen share relatively distinctive forms as Streptorhynclzia kempei, Waagenoconcha payeri and Miiirwoodia greenlandica. On the other hand, the Fossil I1 Zone is easily compared with the Pterospirifer alatus Zone. on the basis of the mutual occur- rences of Pterospirifer alatus, Pleurohorridonia scoresbyensis, Choristites s@derberghi and O d o n - tospirifer mirabilis. At the Schucherts Flod Valley of Scoresby Land the Fossil I Zone is not devel- oped, while the Fossil I1 Zone is lacking at River 14, east of Kap Stosch, although the elements of the Fossil I1 Zone are unesrthed together with those of the Fossil I Zone from the ‘white block’ derived from the underlying beds to be included "I a a a @a PERMIAN I Group Tempelfjorden K~PP Staros t in Formation Mallemuk Mountain Group 1 I ASS 1C Foldvik Creek Forniatlon Brachiopod zonation 215 Mertonberget, Chydeniusbreen, N y Friesland. On the other hand, specimens of Licharewia wi- mani were not figured by Gobbett. He proposed this new species from the specimens figured by Wiman (1914) from Lovenberget, Ny Friesland. Cutbill (1968) tentatively correlated the beds from which Wiman collected brachiopods on LovCn- berget to the Svenskeegga Member in West and Central Spitsbergen. Consequently, there seems to be a considerable uncertainty regarding the precise stratigraphical occurrence of this genus in N y Friesland, Northeast Spitsbergen. Actually, we did not find Licharewia in the V ~ n n g e n Mem- ber, but found it in both the Svenskeegga and Hovtinden Members of the surveyed area. According to Gobbett (1964), the following species were common between the Svalbardian Stage and the Upper Permian Foldvik Creek For- mation in Central East Greenland: Krotouia lich- arewi, Horridonia timanica, Streptorhynchus kempei, Neospirifer strio-paradoxus, Spiriferella keilhauii, Spiriferellina cristata and Craspedalosia pulchella. Of these, the first species was only found in the overlying beds of the ‘Spirifer Lime- stone’, and the remaining six were described by the finder from the ‘Spirifer Limestone’. However, the specific identification of Sowerbina maynci described from the Foldvik Creek For- mation by Dunbar (1955) with Horridonia timan- ica is very questionable. Streptorhynchus kempei and Neospirifer strio-paradoxus are more abun- dant in the Hovtinden Member than in the V0rin- gen Member of Central Spitsbergen. Spiriferella keilhauii and Spiriferellina cristata are relatively long-ranging species. The occurrence of Cras- pedalosia pulchella in the ‘Spirifer Limestone’ or the Tokrosscbya Formation is noteworthy, because the age of this species is well dated to late Permian, and it has been known to occur from the Lower Kazanian of the Kanin Peninsula, USSR (Stepanov et al. 1975), in addition to the occur- rence in the Fossil I Zone at Forposten on Cla- vering 8 , Central East Greenland. In Svalbard, specimens assigned to this species were, according to Gobbett (1964), detected from the Misery- fjellet Formation (‘Spirifer Limestone’) of B j ~ r n - ~ y a , the Tokross0ya Formation of S~rkappBya and the ‘Spirifer Limestone’ on the Pyramiden summit in Dickson Land. The Miseryfjellet For- mation of Bj0rncbya and the Tokross~ya For- mation of Smkappoya may partly include Upper Permian sediments (Cutbill & Challinor 1965), and there is considerable doubt regarding the in the Triassic Otoceras Zone. The Foldvik Creek Formation near the southern coast of Clavering P, is provided with both. The occurrence of an ammonoid Godthaabites just above the Fossil I1 Zone is noteworthy. The Godthaabites-bearing beds may be equivalent stratigraphically to the Haydenella wilczeki Zone, uppermost brachiopod zone of the Kapp Starostin Formation. Age assignment The age of the Kapp Starostin Formation, based mainly on brachiopods that are common to Spits- bergen and the USSR, has been assigned dif- ferently by many workers. The lower boundary of the formation has been regarded as ranging from Sakmarian to Ufimian in age, and the upper from Sakmarian to latest Permian. Age of the lowest beds of the Kapp Starostin Formation Malkowski & Szaniawski (1977) were greatly impressed by the supposed Leonardian affinities of the conodonts collected from the Voringen Member in Polakkfjellet (Torell Land) and the Hornsund regions. On the other hand, Sosi- patrova (1967) and Stepanov (1967) considered the lowest boundary of the formation to be Kun- gurian in age, based on foraminifers and brachio- pods, respectively. Further, Burov et al. (1965) and Ustritsky (1971), using brachiopods, con- sidered the formation only to have started after the Kungurian. Among these opinions, it should be noted that a conflicting age has been given to the brachiopod assemblage of the lowest beds of the ‘Brachiopod Cherts’ (= ‘Spirifer Limestone’) and the Kapp Starostin Formation (= V ~ r i n g e n Member). The presence of Licharewia and several species com- mon to the Upper Permian Foldvik Creek For- mation of Central East Greenland in the ‘Spirifer Limestone’ strongly denotes a late Permian age for the lowest beds of the Kapp Starostin Forma- tion. Gobbett (1964) described two species of Licharewia, L. spitsbergiana and L. wimani from the ‘Spirifer Limestone’ of Ny Friesland, North- east Spitsbergen. The presence of Licharewia in the ‘Spirifer Limestone’ is important, because this genus is unknown in the Lower Permian of the USSR or elsewhere. Licharewia spitsbergiana was described only from the ‘Spirifer Limestone’ on 216 K. Nakamura, G. Kimura & T. S . Winsnes stratigraphical position of the beds from which specimens were collected o n t h e Pyramiden sum- mit. In short, the stratigraphical occurrence of Craspedalosia pulchella in Svalbard is also rather uncertain. On the other hand. the occurrence of such species as Horridonia titnanica, Neospirifer gron- walli, Waagenocoticha irginae, Spiriferella dra- schei and Yakovleuia inipressa from the Veringen Member indicates the Kungurian Age of the member. Ivanova (1972) described Horridonia timanica, Yakouleuia inipressa, Waagenoconcha irginae and Spiriferella draschei from the late Artinskian Talatinsk Formation and the Kun- gurian Lekborkisk Formation of Pechora, USSR. Kulikov (1974) listed Horridonia timanica, Neo- spirifer griin walli. Waagetroconchu irginae and Spiriferella cf. draschei from the Kungurian of the Urals. Although a general uncertainty relating to the specific identification and t o the strati- graphical range of these species may exist, these occurrences strongly suggest the Kungurian age for the lowest beds of the Kapp Starostin Forma- tion. I t thus appears that Yakovleuia impressa is restricted to the early Permian in the USSR and that it is one of the most important species for the correlation of these rocks. A n important matter t o decide is whether the V ~ r i n g e n Member is early Permian or late Permian in age. I n this paper, the age of the member is tentatively esti- mated to be early Permian, in a two-fold division. based more on the occurrence of Yakouleuia impressa than the uncertain occurrences of Lich- arewia and Craspedalosia pulchella. However. further study is required. A g e of the uppermost beds of the K a p p Starostin Formation Recently, most authors presumed the age of the uppermost beds of the Kapp Starostin Formation to be early Kazanian. because the brachiopods from the upper part of the formation indicated a close relationship with the Kazanian of the USSR. In this respect, the youngest age assumption was offered by Cutbill & Challinor in 1965. who main- tained that the formation represented the Kun- gurian and the whole U p p e r Permian, but without presenting any palaeontological evidence. W e are most concerned that the age of the upper border of the Kapp Starostin Formation should be dis- cussed more precisely. For this purpose, a critical evaluation of Ptero- spirifer alatus, o n e of t h e diagnostic species of the Lower Zechstein, is first taken into consideration. The occurrence of this species is restricted o n Spitsbergen to the Middle Bed of the Hovtinden Member of the Kapp Starostin Formation and in Greenland to the Fossil I1 Z o n e of the Foldvik Creek Formation. Quite recently, Dr. Kozur of the Hungarian Geological Institute contributed very important comments t o t h e Newsletter No. I1 of SCPS (Subcommission o n Permian Strati- graphy), dealing with the age of the Zechstein in the Germanic Basin. He pointed out that the base of the Zechstein lay in the Upper Abadehian, and it was not far from t h e Dzhulfian base in the Tethys. If this assumption is correct. either the Middle Bed of the Hovtinden Member or the Fossil I1 Z o n e of the Foldvik Creek Formation is reasonably dated t o late Permian, in a threefold division. The discovery of this species has been reported from the Lower Permian of China (Ding & Qi 1983) and the Lower Kazanian of the Baltic Province of USSR (Suveizdis 1984). However, the Chinese specimen figured seems too poorly preserved to make a specific identification, while the Russian specimen has not been described or figured. As described earlier, the uppermost brachio- pod zone of the K a p p Starostin Formation, t h e Haydenella wilczeki Z o n e a t Festningen is exactly correlated to the upper part of the Martinia lime- stone including an ammonoid Godthaabites at Clavering 8. Central East Greenland. Most ammonoid workers regard Godthaabites as syn- onymous with Cyclolobus except for Waterhouse (1972) and Zakharov (1983). T h e stratigraphical distribution of Cyclolobus and Codthaabites is shown in Table 1. They a r e mostly confined to rocks of Abadehian-Dzhulfian ages in the Tethys faunal realm. T h e highest horizon of the re- presentatives of these genera so far known is the Upper Dzhulfian Vedioceras Zone in Trans- caucasia, except for the occurrence in the upper- most Permian of t h e Kitakami Mountains, Japan (Ehiro & Bando 1985). Although the Cyclolobus- bearing horizon in the Kitakami Mountains is thought t o be Changhsingian or Dorashamian in age, there does appear to be some doubt. A s pointed out by Balme (1979), Teichert & Kummel (1976) discussed these matters in detail and then accepted the view of Furnish (1966) that t h e pres- ence of Cyclolobus indicated a post-Guadalupian age for the Martinia limestone in Central East Greenland. Brachiopod zonation 217 3 10 i z 4 0 J 0 m 218 K. Nakamura, G. Kimura & T . S . Winsnes In short, the uppermost beds of t h e Kapp Sta- rostin Formation of Festningen a r e estimated with high possibility t o be late Permian in age and most probably to be Dzhulfian. Kotljar (1984) presented a synopsis of t h e correlation of the Permian between the Urals and Tethys in which she correlated the Tatarian Stage of the former to the whole of the Upper Midian, Dzhulfian. and Dorashamian of the latter, as shown in Table 1 . If this correlation is acceptable, the Kapp Starostin Formation lies within the interval from late Kun- gurian to early or even early late Tatarian of the Russian Permian standard. Conclusion The Kapp Starostin Formation commencing with the ‘Spirifer Limestone’ is about 4 0 0 m thick at Festningen and about 3 4 0 m at Sveltihel, West Spitsbergen. Taking into account the strati- graphical and palaeontological evidence, the fol- lowing conclusions may be introduced with regard to the K a p p Starostin Formation: a ) Five brachiopod zones are identified within the formation: they a r e the Horridonia timanica Zone. the Waagenoconcha sp. A (Gobbett 1964) Z o n e , the Megoiisia wevprechti Z o n e , the Ptero- spirifer alatiis Z o n e . and the Haydenella btdczeki Zone in ascending order. b) The basal part, that is. the ‘Spirifer Lime- stone‘. is contemporaneous with the uppermost part of the Upper Marine G r o u p (Mallernuk Mountain Group) in the Holm Land and A m d r u p Land areas of Northeast Greenland. based on the mutual occurrences of some diagnostic brachio- pod species. probably indicating a Kungurian age. c) The upper part of the K a p p Starostin For- mation, represented b y the upper three zones. roughly corresponds to the Permian Foldvik Creek Formation in Central East Greenland. d) Two brachiopod zones are recognized in the Foldvik Creek Formation. T h e lower zone (Fossil I Z o n e ) is contemporaneous with the Megoiisia weyprechti Zone. and t h e upper o n e (Fossil I1 Z o n e ) with the Pterospirifer alatus Zone of West Spitsbergen. The occurrence of an ammonoid Godthaabires or C~clolobiis just above the upper Fossil I1 Z o n e in Central East Greenland is note- worthy. As a result. the Haydenella wilczeki Zone in the Kapp Starostin Formation can be strati- graphically correlated with the Godthuabites- bearing beds in Central East Greenland. and must consequently b e post-Guadalupian (most prob- ably Dzhulfian) in age. e ) In conclusion, we recommend the Kapp Sta- rostin Formation at Festningen, yielding ample and various kinds of fossils, as the standard sec- tion of the Middle-Upper Permian in the Arctic region. The uppermost Permian (Changhsingian o r Dorashamian) may, however, be missing. Acknowledgements. - The authors would like to thank Odd Rogne. Director of Norsk Polarinstitutt, and Professor Emeri- tus Tatsuo Tatsumi (University of Tokyo) who organized and directed this cooperative work on Spitsbergen. During the stay in Oslo and on Spitsbergen, Nakamura and Kimura were extended numerous courtesies by the staff of Norsk Polarinstitutt; they are particularly indebted t o 0rnulf Lauritzen, Dr. Yoshihidc Ohta. Thor Siggerud and KBre Bratlien for con- sultations and advice on the preparation of the field work. Atlc M ~ r k of the Continental Shelf Institute, Norway, kindly afforded facilitics for transportation by boat from Festningen to Sveltihel. Ayumu Ohta accompanied the Japanese Expedition Party o n Spitsbergen and helped us in various ways. Drs. J . M. Dickins (Bureau of Mineral Resources, Australia), N . Archbold (Commonwealth Scientific and Industrial Research Organization. Australia), Yu. Zakharov (Far-Eastern Scientific Centre. USSR). J . M. Hurst (Geological Survey of Greenland. Denmark). Z. Liao (Nanjing Institute of Geology and Palaeontology. People’s Republic of China) and 14. Kozur (Hungarian Geological Institute. 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