File:Annual report (1910) (14776454021).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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p 200 yards east of the road.Ledges of limestone probably determined the terrace slope justwest of Sleights house. Drift conceals outcrops north of Sleightsbarns. Quartzitic rock of the slate formation outcrops between thePleasant Valley and Overlook roads 100 feet north of the latter.Between here and the outcrop of limestone marking the northeastcorner of the block there are no outcrops. Presumably the lime-stone, in part at least, underlies the flat terrace level just east ofByers house. On the eastern margin of this block, partly on the property ofA. W. Sleight and partly on that of George Byer, is an old quarry,which many years ago furnished stone for the abutments of thebridge at Manchester. The fact that this is a rich fossil localityappears up to this time to have escaped attention. There are two varieties of rock in the quarry. The one which wasquarried chiefly and which makes up most of the quarry is a darkblue rock which varies in texture from a fine calcareous con- Plate 10
Text Appearing After Image:
A portion of the wall in A. W. Sleights quarry. In the foreground Trenton con-glomerate with Solenopora compacta resting on probable Calciferous which is exposed in the upper half of the picture. The two are disconformable,but have the same dip to the southeast GEOLOGY OF THE POUGHKEEPSIE QUADRANGLE 6j glomerate, shown at the south end and in the central part of thequarry, to a dense fine-grained mud rock at the northern part. Thebedding surfaces are distinct, and good-sized blocks, frequently afoot or more in thickness, have been removed. The rock has beenweakened by blasting. It still breaks with difficulty into thin irregu-lar pieces that are often crowded with fossils and their fragments.The removal of the mud rock at the south end of the quarry hasexposed the basal conglomeratic portion which contains abundantcrinoid stems, colonies of Solenopora com pacta and somebrachiopods. The quarry faces east. The beds of limestone striken. 400 e. and dip 420 s.e. At the top of the quarry,

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