Bulletin - New York State Museum . re employed. This body of water was apparently at first as noted by Uphamconfluent on the south with what is in this paper denominatedLake Albany. Just how far north in the Cham])lain valley theice had retreated at this early stage depends on the interpreta-tion of the higher gravel ridges and boachlike deposits in thenorthern half of the Champlain valley. On the extent to whichthe ice had retreated de])cnds in turn the extent at any time ofthe lake toward the north. The outlet of these ice-dammed watersat this early stage of confluence across the present div
Bulletin - New York State Museum . re employed. This body of water was apparently at first as noted by Uphamconfluent on the south with what is in this paper denominatedLake Albany. Just how far north in the Cham])lain valley theice had retreated at this early stage depends on the interpreta-tion of the higher gravel ridges and boachlike deposits in thenorthern half of the Champlain valley. On the extent to whichthe ice had retreated de])cnds in turn the extent at any time ofthe lake toward the north. The outlet of these ice-dammed watersat this early stage of confluence across the present divide of theHudson and Chamj)lain basins is a matter which concerns theinterpretation of Lake Albany on the south and is considered inthai connection. Lake Vermont may be said proj)erly to havecome into existence when in consequence^ of a local lowering ofthe wafers south of Fort Edward a discharge began across a bar-lier inio Ihe Hudson vallev on the south. tl. 17 EDUCATION DEPARTMENT UNIVERSITY OF THE STATE OF NEW YORKSTATE MUSEUM. Geology by J B Woodworth <n Marine Deposits Deposits of Lakes Ketreatal glacial de-Albany ana Vermont posits of Soiitheruand deltas about Hudson Map of r,akes Albany and Veni uit, and the OUauiplain marine deposits ANCIENT WATER LEVELS OP CHAMPLAIN-HUDSON VALLEYS 191 Before passing to the notice of the outlet of Lake Vermont, it isdesirable to determine, if possible, from the facts in hand thenature of the change which brought about a separation of theclay-depositing waters which extended from the upper Hudsonvalley into that of Champlain. On plate 28 of this report, a line(A-B) is drawn on the profile for the purpose of comparing cer-tain water levels which occur at indicated points on the sides ofthe Hudson and Champlain valleys. The plane in which thisline lies has a tilt from north to south at the rate of about 2 feetto the mile. The line is drawn through two of the highCiSt beachesfound between Port Kent and Saw^ers hill at Str
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectscience, bookyear1887
