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Geology and Mineralogy. 231 
Glacial and Champlain eras in New England (this Journal, v, 
i Long 
of glaciated material,” but as “ often inconspicuous;” as, In many 
parts a succession of conical hammocks wit -kettle-holes, the latter 
sometimes the sites of ponds; as frequently a limit between a 
: « 
more northern region of many lakes, and a southern of no 
lakes, the lakes owing their existence mostly to the damming 
effect of the drift deposits. The mean width is about a mile. 
“ 
it appears through the stratified drift as low gravel hills. These, 
Winding up over the slate hills to the west, are soon developed 
Beginning in Northampton county, a mile below Belvidere, 
* 
