Bulletin - New York State Museum . e sea recognition carries with it, in view also of the marine depositswhich followed, the assumption that following the disappearanceof the ice from this portion of the valley a reversed movement setin by which the land was lowered on the north relatively to thesouthern part of the State so as to produce an uplifted barrierin that direction capable of retaining the waters which formed thelakes whose records are so clearly shown in the succeeding depos-its of clays and marginal sand deltas. It must be borne inmind,however, that these earlier movement
Bulletin - New York State Museum . e sea recognition carries with it, in view also of the marine depositswhich followed, the assumption that following the disappearanceof the ice from this portion of the valley a reversed movement setin by which the land was lowered on the north relatively to thesouthern part of the State so as to produce an uplifted barrierin that direction capable of retaining the waters which formed thelakes whose records are so clearly shown in the succeeding depos-its of clays and marginal sand deltas. It must be borne inmind,however, that these earlier movements preceding the clearerrecords of the glacial lakes and the marine invasion depend onscattered and fragmentary evidence which further study of thedistrict may i)rovc in a bettor light to be capable of a differentinterpretation. Sired liOad Icrracc | TicondiM-oga quadrangle, pi. 15]. Northof Street Koad and at the eastern base of line k mountain there ^1 PART OF THE TICONDEROGA QUADRANGLE STATE MUSEUM B U LLETl N 84. PLATE THE STREET ROAD LATERAL MORAINE TERRACE And some of the clearer shore-lines about Crown PointScale 6250O 2 Miles Coiitoiu:*iatem-al 20 feet. Dcvttun IS me<:v/L sea, l^vel. Lateral terrace Morainicdeposit. Eskerlet. Kettle-hole. Wave-lines. h ANCIENT WATER LEVELS OF CHAMPLAIN-HUDSON VALLEYS 155 is a high lateral moraine terrace locally known as Sawyer hill,whose surface is contoured by the 540 foot line. Buck mountainrises in a steep wall to a hight of over 1000 feet above the levelof this deposit. An excavation made at the southern lobe of thedeposit showed it to be stratified with a foreset structure dippingsouth. The materials are gravelly. In about the middle of theterrace to the west of the point where the highway from StreetRoad to Crown Point reaches the summit there is a large and welldefined kettle hole. Farther north evidences of deposition in thepresence of ice continue to appear; and in the pass between theoutlying tectonic block of Dib
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectscience, bookyear1887
