REPORT OF THE DIRECTOR igi2 



17 



Albion and Oak Orchard. Preliminary control has also been made 

 in the Medina and Ridgeway quadrangles. Reports with maps have 

 been rendered in final form on the following quadrangles : Attica, 

 Depew, Caledonia, Batavia, Eden, Silver Creek; the Phelps quad- 

 rangle is also essentially complete. 



For this entire western New York region the present condition 

 of the areal survey for the geologic map may be thus summarized : 



Quadrangles published : 



Auburn Honeoye 



Buffalo Naples 



Canandaigua Nunda 



Elmira Olean 



Genoa Ontario Beach 



Hammondsport Ovid 



Penn Yan 



Portage 



Tully 



Watkins 



Wayland 



Quadrangles reported : 



Albion Caledonia 



Attica Depew 



Batavia Eden 



Brockport Hamlin 



Oak Orchard 

 Phelps 

 Silver Creek 



Quadrangles mapped : 

 Cherry Creek Dunkirk 



Westfield 



Quadrangles begun : 

 Bath Medina 



Ridgeway 



In northern New York a completed report on the North Creek 

 quadrangle awaits publication. In the last field season, the 

 Lake Pleasant quadrangle was surveyed by W. J. Miller, 

 who reports that the prevailing rocks belong to the syenite- 

 granite series and comprise syenite (augitic to hornblendic), 

 granitic syenite, granite and porphyry. These rocks show^ all 

 sorts of gradations from one type to another. Grenville gneisses, 

 in areas sufficiently free from igneous rocks to permit separate 

 mapping, are present in \ery subordinate amount. Grenville 

 limestone is unusually scarce, only a few small outcrops having 

 been noted. 



Still other areas, often of considerable size, are made up of 

 very closely involved syenite or granite and Grenville. Many 



