GLACIAL AND POST-GLACIAL HISTORY 623 



to Westport; (5) by the Bouquet River high-level delta; (6) by the 

 Reber and Towers Forge gravel plateaus or deltas on the North 

 Branch of the Bouquet River; (7) by the moraine or series of moraines 

 along the higher land between Harkness and Schuyler's Falls, and 

 at Cadyville and west toward Dannemorra; (8) by the Saranac high- 

 level gravel plateau; (9) by kames or moraine west by south of West 

 Chazy. 



HUDSON-CHAMPLAIN WATER BODY. 



When the ice had retreated into the Champlain Valley, the Hudson 

 water body occupied the lowland between the Hudson and the Lake 

 Champlain Valley also, and may now be conveniently referred to 

 as the Hudson-Champlain water body (see Fig. 22).' The successive 

 positions of the ice as it retreated up the Champlain Valley are 

 known to the writer at a few points only, and these are on the west side 

 of the valley. The moraines found above the highest level reached by 

 the water body near Crown Point, and at the various places indicated 

 in the detailed description above (pp. 462, 463), between Harkness 

 Station and Cadyville, and west of the latter place toward Dannemorra, 

 all indicate a general north-south and northeast-southwest direction 

 of the ice-front, and also indicate that the ice was in the lower land 

 and its edge was on the slopes of the higher land. This appears like- 

 wise to have been true when the Baldwin and Street Road plateaus 

 were built. Where the ice-edge and the body of ice were at Crown 

 Point when the highest deposits of lacustrine origin were deposited 

 is not known, although doubtless, it could be determined by detailed 

 investigation. It seems difficult to reconcile the eastward dip of the 

 stratiiied drift built out in the water body with the position of the 

 body of the ice in the lowlands when the moraine higher on the 

 mountain-side was built. The deltas, both on the main Bouquet 

 River and on the north branch, are so situated that neither the assump- 

 tion of an embayment in the ice-front nor a protruding tongue of ice 

 down the Champlain Valley is necessary to explain the phenomena. 

 The deposits of gravel at 580 feet on the Ausable may be interpreted 



I This name was first given to the water body occupying the Hudson and Cham- 

 plain Valleys by Mr. Warren Upham, who published on this subject in 189 1 in the 

 Bulletin of the Geological Society of America, Vol. Ill, pp. 484-87, and in the American 

 Journal of Science, Vol. CXXIX (1895), pp. 13 ff. 



