L180 NEW YORK STATE MUSEUM 



J Anticline on Vlightberg near western side 



K Outcrop of Manlius limestone at side of road leading to 



house on top of Vlightberg 



M Middle quarry on Glory hole vein on east side of Vlightberg 



O Old quarry on Becraft limestone east side of North hill 



S Spring quarry at junction of Delaware avenue and Yeoman 



street 



T Taylor's corner quarry at south end of Vlightberg, on Has- 



brouck av. 



U Unconformity exposed near Taylor's corner 



V Vertical cut in Becraft limestone, west side of Vlightberg 



W White lime quarry on Becraft limestone, east side of North 



hill 



Generalized section 



The geologic formations exposed in the Vlightberg and in the North hill range 

 from Champlainic (Lower Siluric) to Ulsterian (Middle Devonic) in age, and 

 their order of sequence and thicknesses are shown in the following table : 



Middle Devonic 



Onondaga limestone 



. Ulsterian Esopus grit 



Feet 



75 



300 



Lower Devonic 



Oriskanian Oriskany sandstone and 



limestone 



60 



Port Ewen limestone 



New Scotland shale. ..... 



Coeymans limestone 



150 + 



40 

 100 + 



50 



Upper Ontario or 

 Upper Siluric 



Manlius limestone 



cement \ Ron(iout waterlime 



. Cayugan .... ser j es "j Cobleskill limestone 



" ( Salina waterlime 



Wilbur limestone 



_ Unconformity - 



45 



15 



—1 



10 



5—7 



1 000 + 



Neochamplainic or 

 Lower Siluric, , 





STRATIGRAPHY AND PALEONTOLOGY 



Champlainic 

 The substructure on which lie the Ontario and Devonic forma- 

 tions of the region is a mass of highly tilted and often much 

 contorted sandstones and shales, usually referred to the " Hud- 

 son river group," and probably equivalent to the Normans kill 

 beds of the upper Hudson river valley. In constitution these 



