id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
gc-18	Riding, Robert	Abiogenic, microbial and hybrid authigenic crusts: components of Precambrian stromatolites	2008	31	.pdf	application/pdf	25205	1309	53	This suggests that Sparry Crust stromatolites are essentially abiogenic aqueous precipitates, in the sense that their formation does not require biotic pro cesses and that they do not typically contain organically generated fabrics. Hybrid Crusts consist of millimetric alternations of these fabrics, in layers that are more regular than those usually present in Fine-grained stromatolites, and less regular than those of Sparry Crust stromatolites (Fig. 12).	cache/gc-18.pdf	txt/gc-18.txt