FORMATIONS OF THE SKUNNEMUNK MOUNTAIN REGION 



51 



TABLE SHOWING RELATIONS OF THE UPPER SILURIC SECTIONS OF 

 EASTERN NEW YORK WITH THE WESTERN NEW YORK SECTION 











Previous cor- 



Western 



Port Jervis, 



Ulster co. 



Cornwall, 



relation for 



New York 



Orange co. 



Orange co . 



Eastern New York 











and New Jersey 



Cobleskill 



Cobleskill 



Cobleskill 



Cobleskill 



] 



Salina series 



Salina series 



Salina series 



Salina series 



V "Niagara" 



Bertie 



Decker Ferry 



Decker Ferry 



Decker Ferry 



i 



Camillus 



Bossardville 



(Rosend ale 







Syracuse 



Poxino Island 



cement & 







Vernon 





Wilbur lime- 

 stone) 







Pittsford 





Binnewater 











sandstone 



f Binnewater 

 Long- J sandstone 



Clinton 





High Falls 



High Falls 



wood I High Falls 



Medina 





shale (?) 



shale 



I shale 







Shawangunk 



Shawangunk 



Shawangunk 



Oneida 



Guelph 











JLockport 











Rochester 











Clinton 











Medina includ- 



Unconformity 



Unconformity 



Unconformity 



Unconformity 



ing Oneida at 











top and Os- 











wego sand- 











stone at base 











""Hudson 



"Hudson 



"Hudson 



"Hudson 



"Hudson 



River" 



River" 



River ' ' 



River" 



River" 



'beds 



beds 



beds 



beds 



beds 



The subdivisions of the Salina series are not intended to show 

 exact stratigraphic equivalents as read horizontally across the 

 page, but rather the subdivisions recognized in the different 

 sections. 



In Rensselaer county there is a quite extensive plateau under- 

 lain by what is known as the Rensselaer grit. This formation 

 has generally been regarded as basal Upper Siluric and correlated 

 with the Oneida conglomerate or the Shawangunk conglomerate, 

 the two latter being regarded as stratigraphically equivalent. 

 If we regard the Rensselaer grit as basal Upper Siluric then this 

 region must have been submerged shortly after the Taconic 

 revolution. This, however, does not appear to be the case since 

 the grit rests unconformably on strata which in age range from 

 Lower Cambric to and including the " Hudson River " beds. 1 



The evidence furnished by the study of the Shawangunk grit 

 and the Oneida conglomerate does not indicate that either of 

 these formations extended as far as the region of the Rensselaer 



iDale, T. N. U. S. Geol. Sur. Bui. 242. 1904. p. 51. 



