652 CHARLES EMERSON PEET 



greater than required for the Hudson Lake alone, which could have 

 existed without this eastern uplift. 



4. A fourth argument against the salt-water body is the absence 

 of tidal action indicated by the fact that fine sediments were apparently 

 not carried to any great distance from the ice-front. This is shown 

 by a failure to bury some of the kames and other ice-molded features 

 at low levels adjacent to higher gravel, sand, and clay. It may be 

 said that this apparent failure of the fine sediments to be carried out 

 on older and lower deposits in some situations, especially in the 

 southern Hudson, is so extraordinary as to tax even the lake hypoth- 

 esis. In some places this may be explained, however, by the per- 

 sistence of protective stagnant ice-masses. There may be a question 

 whether stagnant ice-masses would endure long enough to be thus 

 effective. If there was sufficient tidal scour to cut the gaps in the 

 moraine the amount required by later events, it is a question if the 

 ice-masses could have endured long enough to prevent the burying 

 of the kames, etc., by the finer sediments carried by the tide. 



5. A fifth point bearing on the hypothesis that the Hudson 

 water body was an arm of the sea is the evidence presented by its 

 altitude when Higher Glacial Lake Champlain was separated from 

 it. The evidence goes to show that its altitude at this time was some- 

 thing less than 200 feet above tide. How much less is unknown. 

 If the amount of uplift while Higher Glacial Lake Champlain was 

 being drained could be determined, the altitude of the Hudson water 

 body when the barrier south of Fort Edward appeared would follow. 

 (See pp. 639, 640.) 



WHAT EVIDENCE IS THERE THAT THE HUDSON WATER BODY WAS A 



LAKE ? 



If the existence of a body of standing water be admitted, all the 

 arguments against the submergence or salt-water hypothesis throw the 

 scales in favor of the lake hypothesis. The evidence in favor of the 

 lake hypothesis is as follows: (i) the existence of a barrier; (2) the 

 evidence of deep channels cut through that barrier and submerged 

 channels of drainage both inside and outside the barrier; (3, 4, 5, 6, 

 7) the five points mentioned above, as opposed to the salt-water 

 hypothesis. 



I. The existence of a harrier makes the lake possible. — Under the 



