1070 



NEW YORK STATE MUSEUM 



following species from the outcrop of the Schoharie at the junc- 

 tion of the Newman road with the middle transverse mountain 

 road. 1 



Dalmanites anchiops, Phacops cf. bombi- 

 frons, Coelospira cf. Camilla and Chonetes cf. 

 arcuatus. These he considers sufficient to identify the ages 

 of the beds. 



11 ONONDAGA LIMESTONE 



This is the highest formation of Becraft mountain. It occu- 

 pies the top of a ridge in the southeastern portion of the mountain 

 and is of very limited extent. The portion of the bed remaining 

 is involved in syncline no. 2, the eastern limb of which is turned 

 up vertically. The upper part of the rock is very cherty and 

 weathers with irregular surfaces. The limestone is light gray in 

 color and finely crystalline. Fossils are not readily found, but 

 Clarke has recorded Spirifer raricosta and Zaphrentis 

 from the upper part, and from the lower, chert-free beds Odon- 

 tocephalus selenurus, Spirifer varicosus, 

 A try pa reticularis, Leptaena rhomboidalis, 

 Streptorhynchus pandora, Chonophyllum, Zaph- 

 rentis, Favosites and Stromatopora or Fistulipora. 2 Orthoceras 

 and Euomphalus were also noted in the upper beds. 



The total thickness of the Onondaga is not over 25 feet and is 

 probably nearer 20 feet. 



The outcrops of this rock are most easily approached from the 

 eastern road by striking into the fields after crossing the little 

 stream from the Oriskany depression, which here breaks across 

 the strata to join Claverack creek. It may also be approached 

 from the Newman road by following the Oriskany depression 

 northeastward and ascending the hill. The approach over the 

 Schoharie is difficult on account of the wooded and rough char- 

 acter of the land. 



1 Loc. cit. p. 14. 

 2 Loc. cit. p. 15. 



