File:Annual report (1910) (14777201184).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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e gneiss. It seems reasonable to explainthe faulted contact of the gneiss of the Mount Honness spur andthe Fishkill limestone on the northwest of it as primarily due tothis thrust. Later or simultaneous tension faulting dropped thelimestone east of Bald hill into its present position. A number ofscarp faces at different elevations along the northwestern slope ofthe Honness spur in line with the strike of the gneisses, and visibleeven in the season of foliage, mark tension strike faulting of dimin-ishing intensity eastward from the great normal fault on the eastof Bald hill. The eastern face of Honness is marked by a rather conspicuousnormal fault scarp which diminishes and dies away to the south-ward (see plate 6). The throw here was not so great as on theeast of Bald hill. Along the west side of the east road from West Fishkill Hook intothe mountains, is a drop fault of small displacement. It is markedfirst by a cliff of the quartzite, but higher up the mountain it is inthe gneisses.
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GEOLOGY OF THE POUGHKEEPSlE QUADRANGLE 35 On the east of the Hook spur another fault of moderate dis-placement has dropped the quartzite and limestone into the EastHook. The northwestern slope of Shenandoah mountain is very steepfrom the point where it cuts the southern boundary of the quad-rangle nearly to Shenandoah. The quartzite has a northwest dipof approximately 500. The gneiss in places shows precipitousledges, though these are not very high. The angle of slopechangesabruptly from quartzite to gneiss. The steep dip of the quartziteshows considerable disturbance before the break occurred. East of Shenandoah mountain is a clearly defined normal faultscarp along which the younger rocks were dropped. Their erosionhas formed Shenandoah hollow. Along the northwestern slope of the eastern gneiss mass are verysteep and precipitous scarps, sharper even than those of Bald hill.The drift-covered talus slopes at their bases are not to be confusedwith the quartzite. It is probable, however,

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