. Annual report. New York State Museum; Science; Science. EARLY DEVONIC HISTORY OF NEW YORK AND EASTERN NORTH AMERICA 39 Grande Greve limestones This series of strata is divisible as follows in descending order: 3 Pure gray blue limestones without chert 2 Impure gray limestones with chert I Drab hydraulic limestones with pure," heavy-bedded limestones above. I We conceive the lowest beds of this series to be represented by drab and yellowish sandy hydraulic limestones in thin, irregular plates and carry- ing rare layers and nodules of chert. These beds are exposed along the bed of Dolbel
. Annual report. New York State Museum; Science; Science. EARLY DEVONIC HISTORY OF NEW YORK AND EASTERN NORTH AMERICA 39 Grande Greve limestones This series of strata is divisible as follows in descending order: 3 Pure gray blue limestones without chert 2 Impure gray limestones with chert I Drab hydraulic limestones with pure," heavy-bedded limestones above. I We conceive the lowest beds of this series to be represented by drab and yellowish sandy hydraulic limestones in thin, irregular plates and carry- ing rare layers and nodules of chert. These beds are exposed along the bed of Dolbel brook at Grande Greve and at the bottom of the coulee at Shiphead. At the latter point they lie below the j^^ ypj-y characteristic Secllon across the Forillon at Grande Greve and the Kings road to Cape Rosier cove. ? ^ . 1 • 1 ? Elevation of Mt St Alban 1170 feet green layers which Logan makes the summit beds of his division 7. In these hydraulic layers is the first well defined exemplification of the fauna of the Grande Greve series. Specially abundant isChonetes canadensis, covering entire slabs of the rock; Leptostrophia irene and L. magnifica are also very common. The overlying purer limestones free from or with little chert carry Hipparionyx proximus, Rhipidomella m u s c u- 1 o s a, R. 1 o g a n i, M e g a 1 a n t e r i s t h u n e i, C a m a r o t o e c h i a p 1 i o- pleura, all in abundance and affording a very striking combination. With them is the remarkable trilobite Gaspelichas grandegrevensis. For the most part these beds are buried under the* higher strata and it is only along Dolbel brook that exposures are well shown above the dolo- mitic layers beneath. On the shore at Lehuquet's cove east of the Grande Greve these purer limestones appear in force, attaining a thickness of 50 feet. Here they present the chocolate brown color characteristic of some of the purer layers. Please note that these images are extracted from scanned page images that may have been dig
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