. Bulletin of the Buffalo Society of Natural Sciences. Natural history; Science. 32 GEOLOGY OF ERIE COUNTY pyrite is extremely hard and is a mass of casts of fossils which have been replaced by the pyrite. Fossils from this layer at other points have been the subject of a monograph by Frederick B. Loomis. A B D. C F. Houghton, Photo. Fig. 12. Section of cliff, Cazenovia creek, south of Springbrook. A. Genundewa limestone, overhanging. B. Concretions imbedded in black shale. C. Genesee black shale. D. Pyrite layer. E. Moscow shale. The pyritiferous shale, also, is filled with fossils all of whi
. Bulletin of the Buffalo Society of Natural Sciences. Natural history; Science. 32 GEOLOGY OF ERIE COUNTY pyrite is extremely hard and is a mass of casts of fossils which have been replaced by the pyrite. Fossils from this layer at other points have been the subject of a monograph by Frederick B. Loomis. A B D. C F. Houghton, Photo. Fig. 12. Section of cliff, Cazenovia creek, south of Springbrook. A. Genundewa limestone, overhanging. B. Concretions imbedded in black shale. C. Genesee black shale. D. Pyrite layer. E. Moscow shale. The pyritiferous shale, also, is filled with fossils all of which have been replaced by the pyrite. ienesee Beds James Hall considered the Tully limestone a line of demarca- tion. The fauna of the beds above the Tully differs radically from that below it. Conditions favorable to the great profusion of marine life which characterized the seas of the period during which the Hamilton beds were laid down seem to have come to an end with the deposition of the Tully limestone. The difference is more marked in the western part of the state than in the eastern where there is more or less mingling of the faunas of the Hamilton and Genesee Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Buffalo Society of Natural Sciences. Buffalo, N. Y. : Buffalo Society of Natural Sciences
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