File:Annual report (1910) (14756619566).jpg

Identifier: annualreport6421910newy (find matches)
Title: Annual report
Year: 1902 (1900s)
Authors: New York State Museum
Subjects: New York State Museum Science Science
Publisher: Albany : University of the State of New York
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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of a light gray or steel-gray color and is interbedded with other rock which weathers to a soiled gray. The weathered surface of the former shows many spiral coils. The fresh surface reveals a much altered rock. No traces of the whorls,so plainly visible on the weathered rock, can be seen on the freshly-broken surface; but the latter is often dotted or splotched with numerous orange or pollen-yellow markings. In this field there are two conspicuous ledges of the fossiliferous stratum besides many outcrops of other ledges, for the most part soil-covered. In the northwest corner of the next field to the north on Haight's farm is another ledge of the light gray rock covered with the coiled markings. This stratum was traced by scattered outcrops carrying the coils along and within the edge of the woods and thick brush for a mile to the northeast, to within about half a mile of the road from Fishkill Village to Glenham, and then was lost. Beyond this road it has not been noted, unless it may be Plate 12
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Fossiliferous ledges on the farm of Albert Haight, between Fishkill Villageand Glenham. The surface marked by the hammer is covered with the whorls of Ophileta compacta, some of which are visible in the plate GEOLOGY OF THE POUGHKEEPSIE QUADRANGLE 73 represented by a somewhat banded bluish rock without visible fossils which was found on the very edge of the limestone about four miles to the northeast at Swartoutville, a hamlet two and one-half miles north of Brinckerhoff. On the Haight farm the fossiliferous limestone is well exposed in the fields, but in the brush it is followed with great difficulty. This rock, or that with which it is interbedded, is overlain by a calcareous conglomerate in certain places. The fossiliferous limestone is very dense and compact. It is quite impossible to remove the coils from the smooth surface. A hard blow with the sledge simply chips the rock into small pieces with conchoidal fracture. The chisel makes no impression. The coils are most distinct when at right

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