41 8 CHARLES EMERSON FEET 



and for the report on the Glacial Geology of New Jersey,^ under 

 Professor SaHsbury's guidance, work bearing on the problems here 

 involved was carried out in 1897 and 1901. The main results here 

 presented were in hand before the latter date, and the advance since 

 then has been mainly in determining the crustal movement and in the 

 analysis of facts bearing on the origin of the Hudson water body. To 

 Professor Salisbury the writer is under obligation for the opportunity 

 of detailed study of the Pleistocene formations of New Jersey and 

 adjacent portions of New York, for early training in methods of 

 investigation and mapping of those formations, and for suggestions in 

 the original plans for the work, the results of which are here pre- 

 sented. To Professor Chamberlin the writer is under obligation for 

 assistance with difficulties encountered in this investigation, and for 

 continued inspiration to perseverance in searching out the truth. 

 Neither Professor Chamberlin nor Professor Salisbury is responsible 

 for opinions here expressed or for any failure to arrive at the truth. 



GENERAL STATEMENT OF TOPOGRAPHY OF EASTERN NEW 

 YORK AND SOUTHERN NEW ENGLAND. 



Southern New England has been described as an upland rising 

 gradually inland from the sea and reaching elevations of 1,500 to 2,000 

 feet in southern New Hamsphire and Vermont.^ Above this upland 

 there rise higher elevations such as Mt. Monadnock, and groups of 

 elevations such as the Green Mountains and the White Mountains. 

 Below the upland, valleys have been sunk, a small amount near the 

 sea, but deeper farther inland. These valleys are broad on the soft 

 rocks and narrow on the harder rocks. 



Without assuming an identical history, this picture may be trans- 

 ferred to eastern New York, where, as a first approximation to the 

 truth, the country may be pictured as a rolling surface rising inland 

 from the narrows at Long Island and Staten Island. Above this sur- 

 face there are elevations, such as the Adirondacks and the Green 

 Mountains. Below it there are depressions, such as the Hudson and 

 Champlain Valleys. 



1 See Glacial Geology of New Jersey, by Rollin D. Salisbury, assisted by Henry 

 B. KuMMEL, Charles E. Peet, and George N. Knapp (Vol. V of the Final Report 

 of the State Geologist, 1902). 



2 Davis, Physical Geography of Southern New England. 



