REPORT OF THE DIRECTOR AND STATE GEOLOGIST 1901 r9 



servations made by him there have resulted in the complete 

 confirmation of the views which I had previously expressed. 



These facts are of interest in that they give New York, in 

 the study of the crystalline rocks of its southeastern portion, 

 the distinction of having its classification accepted for those 

 adjacent areas in which these rocks occur, this distinction having 

 previously been attained by the early corps of New York geolo- 

 gists and their successor, Professor Hall, in the classification of 

 the Paleozoic rocks of New York. 



Pleistocene 



Hudson-Champlain valleys 



During the field season of 1901, Professor Woodworth con- 

 tinued the investigation of the nature and extent of the sub- 

 mergence of the Hudson and Champlain valleys during and im- 

 mediately after the disappearance of the ^Yisconsin ice sheet. 



In April a week was spent in examining certain localities 

 about the mouth of the Hudson, in Westchester county, on Long 

 Island, and in the neighboring low ground of New Jersey. 

 About the middle of June, he took to the field in the upper Hud- 

 son valley and spent nearly a month in tracing out the Pleisto- 

 cene deposits on the Saratoga and Schuylerville quadrangles 

 so far as they promised to afford a clue to water levels, thus 

 filling out his knowledge of an area not visited in the previous 

 year. He was given leave of absence from the field during mid- 

 summer, and in the middle of August returned to the shores of 

 Lake Champlain to resume the work begun there in the previous 

 summer. He was occupied in this field in going over the area 

 covered by the topographic folios south of Plattsburg till called 

 to Cambridge by his duties in Harvard University. 



The more important results of this field work are as follows: 



There exists along the coast of Monmouth county, N. J., just 

 outside of the terminal moraine and its attendant outwash 

 plain a terrace whose altitude is about 40 feet above the 

 present sea level, but whose outer border has been cut back by 

 wave action, and whose surface, as for example in the valley of 



