File:The physical geography of New York state (1902) (14592323827).jpg

Identifier: physicalgeograph00tarr (find matches)
Title: The physical geography of New York state
Year: 1902 (1900s)
Authors: Tarr, Ralph S. (Ralph Stockman), 1864-1912 Turner, E. T. (Ebenezer Tousey)
Subjects: Physical geography -- New York (State) Glacial epoch Great Lakes (North America) New York (State) -- Climate New York (State) -- Description and travel
Publisher: New York : The Macmillan company London, Macmillan & co., ltd.
Contributing Library: New York Public Library
Digitizing Sponsor: MSN

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ntains extended northward into NewEngland; and toward the east they probably formed landfar beyond the present coast line. This mountain systemextended from New York southwestward into the southernStates. Its eastern extension is unknown; but to thewest was a great sea occupying the site of the Missis-sippi valley and extending northward beyond New York.Whether the Adirondacks and this highland mountainrange were ever connected, and what was the actual formerextension of the two areas, cannot be told in the presentstate of geological knowledge. The record of much ofthe early history has been hidden beneath the strata oflater age. However, in the very early Paleozoic, the waves of thesea beat against the western base of the southern high-lands and these w~ere then, at least, separated from theAdirondack area, which was at that time an island in thePaleozoic sea. This is shown to be true by a ring of pitK?ivyi ItWH* 3 <* •^m:^»^1^ •i-S^^-^f;-^ :-- jn •:xfcl^¥f 5
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(23) 24 The Physical Geography of New York State early Paleozoic sedimentary rocks, which practically sur-round the Adirondacks, and in which fossil beaches cannow be plainly detected. Later folding has doubtlessaffected the Adirondacks, and it is also probable that partsof these mountains have since that time been submerged;but their main post-Archean history is one of long-continued denudation, as a result of which the elevationhas been greatly reduced. Throughout much of the Pale-ozoic, and apparently throughout all of the post-Paleozoictime, these mountains have been subjected to constantdenudation. The structure and detailed history of the Adi-rondacks are very obscurely understood, and little exceptthe most general facts are at present known concerning it.Next in the development of the State came a greatoverturning of the rocks along a line parallel to and nearthe crystalline highlands of the southeast. Indeed, thesewere involved in this folding, which profoundly influencedthe s

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