314 



NEW YORK STATE MUSEUM 



flhawangunk grit 



Silicified quartz conglomerate, making its first appear- 

 ance in the Binnewater region and becoming most 

 prominent southward, where it forms the summit 

 of the Shawangunk range. The pebbles are mostly 

 well worn, generally small or of moderate size, the 

 matrix being a quartz sand and silicious cement. 

 Locally it passes into a quartz sandstone or quartz- 

 ite. Darton records 45 feet near Rosendale and 

 100 feet in the ridges to the south. At Lake 

 Mohonk he finds 160 feet; at Peterkill falls 210 

 feet, while near Ellenville it is about 200 feet, 

 which is its average thickness in the Shawangunk 

 ranee [tig. 205]. 



Fig. 205 



Feet 



0-210 



