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 : 



Feet 



Onondaga limestone 75 



Middle Devonic Ulsterian Esopus grit 300 



Oriskanian Oriskany sandstone and 



limestone 60 



Port Ewen limestone .... 150 + 



Lower Devonic Helderbergian Becraft limestone 40 



New Scotland shale 100 + 



Coeymans limestone 50 



Manlius limestone 45 



Upper Ontaric or cement \ Rondout waterlime 15 



Upper Siluric Cayugan ] Cobleskill limestone —1 



' "'( Salina waterlime 10 



Wilbur limestone 5—7 



„ Unconformity li £LLLl 



Neochamplainic or 



Lower Siluric Mohawkian Normanskill shale 1 000 + 



STRATIGRAPHY AND PALEONTOLOGY 



Champlainic 



The substructure on which lie the Ontaric 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 ITndson river valley. In constitution these 



