REPORT OF THE DIRECTOR I913 59 



The Saratoga and Schuylerville quadrangles 



Also published together in one report with full descriptive details and 

 discussion of the various important interests pertaining to the Saratoga 

 Mineral Springs basin, by Professor Cushing and Doctor Ruedemann. 



The North Creek quadrangle 



Lying in the eastern Adirondack region, the report and map of which 

 have been prepared by Professor Miller. 



The Syracuse quadrangle 

 and its accompanying text, by Professor Hopkins. 



In addition to these reports, there is also a bulletin on the Geo- 

 logical History of New York by Professor Miller, which relates 

 especially to the physical development of this State. All these 

 publications will presently be ready for distribution. 



Central and western New York. In this region Mr Luther has 

 continued the long series of field surveys upon which he has been 

 engaged for nearly twenty years, and during the season of 1913 

 covered the quadrangles of Olcott and Lockport and that part of 

 the Tonawanda-Wilson quadrangles which lies east of the east line 

 of the map prepared and published some years ago in connection 

 with Professor Grabau's bulletin on the Geology of Niagara Falls. 

 Mr Luther's reports on the quadrangles mentioned are now essen- 

 tially prepared and will soon be ready for publication. 



Northern New York. Professor Miller began the survey of the 

 Blue Mountain quadrangle during the summer of 19 13. Most of 

 the time was spent in making a detailed study of approximately 

 one-third of the area in the vincinity of Long Lake and Blue Moun- 

 tain Lake villages. As most of the quadrangle has not been ex- 

 amined and no laboratory work on the rocks yet been undertaken, 

 only certain more evident results of the field work so far executed 

 can be here presented. 



Grenville series. The Grenville rocks are but slightly repre- 

 sented. Their only important development, where free from 

 closely involved igneous rocks, is in Blue Mountain lake and im- 

 mediate vicinity. With slight exceptions, all the islands of the 

 lake consist of Grenville limestone and hornblende-garnet gneiss 

 together with smaller amounts of quartzite and various well-banded 

 gneisses. Outcrops are usually large and excellent. Similar out- 

 crops occur on the lake shores except on the north, and no doubt 

 the bottom of the lake consists almost wholly of such Grenville 

 strata. 



Syenite-granite gneiss series. Rocks of the syenite-granite gneiss 

 series constitute most of the area studied. No very basic phases 



