152 



NEW YORK STATE MUSEUM 



Sedimentary and organic rocks little 



metamorphosed, 46 

 Sedimentary rocks, metamorphosed, 



47 

 Slates, 21, 46, 64 

 Soil, 12 



South Beacon, 10 

 Sprout Brook limestone, 85 

 Sprout brook valley section, Catskill 



aqueduct, 103 

 Steamboat service, 7 

 Stewart, Charles, cited, 21 

 Stockbridge dolomite, 20 

 Stony Point, 67 

 Storm King, 10, 11, 31 

 Storm King-Breakneck fault, ^7 

 Storm King granite, 22, 23, 26, 34, 



40, 83, 109; description, 56 

 Structural geology, 69 



Tarrytown quadrangle, 6, 19 

 Taurus, Mt, 98 

 Terraces, 11 



Tertiary base level, 142 

 Tompkins Cove, 84, 89 

 Tompkins Cove limestone, 92 

 Tompkins Cove-(Peekskill Valley fault 

 line, 78 



Unconformities, Preoambrian un- 

 conformity, T2) 



Verplanck point, 85, 89 



Wappinger limestone, 46, 84; de- 

 scription, 62 



Wappinger series, 23, 31, 33, 129 



Washington, George, 15 



Water, 89 



West Point, 7, 12 



West Point quadrangle, location, 7; 

 total area, 7 ; geography, 7 ; physi- 

 cal geography, 9 



Williams, cited, 68 



Yonkers gneiss, 20 



