﻿REPORT OF THE DIRECTOR I9IO 19 



dantly borne out in the field. In the southeastern parts of the 

 quadrangle the movement was south. In the northwestern section 

 the direction was nearly west, and in the central and southeastern 

 parts around the village of Berne and toward the hamlet of Con- 

 nersville, the direction of striae is intermediate. There is a sharp 

 alignment of drumloidal forms in the east and north which does not 

 prevail in the intermediate or southwest direction, pointing to the 

 more prolonged and heavy scorings of the Mohawk and Hudson 

 lobes. 



About one and one-half miles west of Altamont the exposed slopes 

 which were subject either to I ludson or Mohawk movements, show 

 interesting striae ranging from s. ro° e. to west. On one surface 

 are striae s. 5 c. crossed by another set having directions s. 30 to 

 35 w. Another surface has two sets, one s. 5 to io° w. the 

 other west. These records point to an alternating or conflicting 

 control by the two movements at the very point of differentiation, 

 as determined by the strong northward end of the Helderberg 

 front. 



To the westward detailed study is needed. There is. however, a 

 significant development of moraines which may in a general way 

 mark the southwest border of the lobe, and may probably be con- 

 temporaneous with the Gloversville moraine. These moraines occur 

 near the headwaters of Cobleskill creek near West Richmondville ; 

 along Schenevus creek from its head to its junction with the Sus- 

 quehanna ; along the lower sections of Elk creek valley and Cherry 

 Valley, and along the Susquehanna from Cooperstown to Portland- 

 ville. It is significant that a day's drive among the strong hills 

 between Cooperstown and West ford led to the finding of but one 

 locality of striae, showing a remarkably continuous sheeting of thick 

 ground moraine for such topography. As noted by Chamberlain in 

 his early work in central Xew York, the westward limit of Mohawk 

 movements seems to have been in southern Herkimer county not 

 far from West Winfield and Cedarville. The drumlins and drum- 

 linoids with east by west axes are conspicuous between Richfield 

 Springs and Herkimer. 



INDUSTRIAL GEOLOGY 

 Report on gypsum. As mentioned in my last report, an inves- 

 tigation of the gypsum deposits of the State was undertaken in 1909 

 with the view of a comprehensive description of these resources 

 which are widely distributed and of growing economic importance. 



