242 NEW YOKK STATi: MrSKTM 



Cobleskill Feet Inches 



(1 1 to d 3 Cobleskill limostoiic in several beds, not 



well exposed 6 



Brayman 



C Jiraviiian sliales, tlie hi;4liei- beds exjiosed 

 on tbe i-oadway leading up to tbe (juarry, 

 tlie lower in contact witli tbe basal sand- 

 stones sliown below tbe crusber — on rail- 

 load track. Tbickness as measured by 

 Hartnagel 27 



Binnewater 



b Basal sandstones, a quartz sandstone of 



yellowish and reddish color, consists 

 generally' of almost pure quartz grains 

 though some beds are slightly argilla- 

 ceous. Lower beds thin, tbe upper thick 

 bedded but saccharoidal and containing 

 much pjaite like the overlying shales. 



Thickness estimated 20 



Stratigraphic unconformity. 



Lorraine 



a Lorraine sandstones ( ?) dark grayish or 



purplish silicious sandrock resembling 

 the normal Hudson river sandrock of 

 the Helderberg region, and resting on 

 shales which have the ai>pearance of 

 the normal Hudson river shales in other 

 ])arts of the ITelderbergs. These beds 

 are very unlike tbe more friable look- 

 ing sandstones wbiib underlie the 

 Brayman shales conformably. Tliis and 

 the resemblance to 1be Hudson river 

 beds are the only evidence so far obtained 

 tbat tbe lowest beds of lliis section are 

 Hudson river. Tbev mav bowever be- 



