. Bulletin - New York State Museum. Science. GEOLOGY AND PALEONTOLOGY OF THE SCHOHARIE VALLEY 159 this period the near shore sand and pebble beds of the lower Oriskany were deposited in the Rondout region and southward iind the low^er Oriskany beds of Becraft mountain were deposited probably at a greater distance from the shore, so that the silicious element in them became much reduced. As has been shown elsewhere^ the Oriskany of Becraft mountain is a continu- ous series with the Helderbergian series, the calcareous Port Ewen beds of that locality forming a complete transition from the one to
. Bulletin - New York State Museum. Science. GEOLOGY AND PALEONTOLOGY OF THE SCHOHARIE VALLEY 159 this period the near shore sand and pebble beds of the lower Oriskany were deposited in the Rondout region and southward iind the low^er Oriskany beds of Becraft mountain were deposited probably at a greater distance from the shore, so that the silicious element in them became much reduced. As has been shown elsewhere^ the Oriskany of Becraft mountain is a continu- ous series with the Helderbergian series, the calcareous Port Ewen beds of that locality forming a complete transition from the one to the other. Fossils of the Oriskany formation Brachiopods are the most characteristic fossils of this forma- tion. One of the most striking is H i p p a r i o n y x p r o x i m u s. Fig. 75 Hipparionyx proxiraus [fig. 75] with its extremely convex brachial and nearly flat pedicle valves, the latter with strong muscular impressions, which have ^Stratigraphy of Becraft 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; New York State Museum. Albany : New York State Education Dept
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectscience, bookyear1887
