. Annual report. New York State Museum; Science; Science. GEOLOGY OF THE NEW YORK CITY AQUEDUCT 41 Ewen as a single unit. If any distinct formation is to be recog- nized it would be on the basis of transitional faunal character, placing the fossiliferous upper 100 feet in the Oriskany transition and confining the name Port Ewen to the rather unfossiliferous and concretionary, shaly, argillaceous limestone of the lower 100 Fig. 3 Spirifer arenosus (Conrad), one of the characteristic index fossils of the Oriskany occurring in the Port Ewen-Oriskany transition This transition rock is stron
. Annual report. New York State Museum; Science; Science. GEOLOGY OF THE NEW YORK CITY AQUEDUCT 41 Ewen as a single unit. If any distinct formation is to be recog- nized it would be on the basis of transitional faunal character, placing the fossiliferous upper 100 feet in the Oriskany transition and confining the name Port Ewen to the rather unfossiliferous and concretionary, shaly, argillaceous limestone of the lower 100 Fig. 3 Spirifer arenosus (Conrad), one of the characteristic index fossils of the Oriskany occurring in the Port Ewen-Oriskany transition This transition rock is strongly bedded, argillaceous and silicious limestone, very quartzose in certain layers, but there are no exposures in this area that would be called sandstones. Fossils are abundant and show marked Oriskany peculiarities. Those of most characteristic relations are: Hipparionyx proximus, L e p t o s t r o p h i a magnifica, Spirifer murchisoni, Spirifer arenosus, Platyceras nodosum, Strophostylus 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 New York State Museum. Albany : University of the State of New York
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectscience, bookyear1902
