HEW rOBK si a IK Mis HUM 



Greene county 1 



Ernest rmatdona in the county arc those of the 



I Upper Belderberg, which extend across 



rnnty from its northern to ita southern 



bonlrr, t 1 d by the Oriskany sandstone. 



Onondaf usually represented by its cherty member, 



. and is of little use except for building purposes 



ial, but the Lower Helderberg supplies an abun- 



Ime rock, which could be employed in several directions. 



A- ti e ■ ortl i rn boundary the Lower Eelderberg limestone ridge 



is pro' ;• miles back from the river, the shore lines of the 



Qu; ■ abutting against it. In this vicinity it is 



quarri Baltimore, by W. Fuller's Sons. At Catskill, 



the ridge approaches close to the Hudson, and is easily 



availal c shipment. Both the Scutella and also the under- 



lyi: posed in the ridge, which closely follows 



the river from Catskill southward to Saugerties, and, while they 



have been much used for building, other uses have remained in 



the round. 



R My the possibility of combining the Helderberg limestone 

 with t rby Quaternary clays for the manufacture of Port- 



baa been recognized, and several factories are in 

 iplation, while one large works is nearly completed at 

 Lai 

 Where a m of certain layers is to be observed, the dip 



of the b' to be considered, for in this ridge it is quite 



Log to the folding which the region has been sub- 

 to. 



^ limi forma the most massive member of the 



] - ;i ' county. It is similar in its char- 



n side of the river near Hudson, 



Tentaculite and Pentamerus. West of 



ely quarried by George Iloldredge 



. 



