REPORT OP THE STATE PALEONTOLOGIST 1902 1121 



very abundant, and an undetermined species of Beyriehia occurs 

 in large numbers. Chaetetes sp. and Tentaculites sp. undet. are 

 also found in the thin layers. From the basal layer a single 

 specimen of Leptaena rhomboidalis has been ob- 

 tained. This species was also found at Clarke's cave west of 

 Schoharie. It is however very rare in the Cobleskill of Schoharie 

 county. 



The following section will show the relation of the Cobleskill 

 to the overlying rock as it is exposed in the nearly vertical wall 

 of the Brown quarry. 



g§ Feet Inches 



1 Thin bedded, light colored waterlime .. 10 



2 Blue limestone . . . . 2 1 



3 Blue limestone 2 1 



4 Cement rock 4 2 



5 Thin limestone layers, somewhat arenaceous ... . . 10 



6 Limestone (marble layer) 1 4 



7 Limestone (base of quarry) 3 2 



giving the total thickness of 14 feet 6 inches. The three lower 

 divisions represent the Cobleskill, being here exposed for a thick- 

 ness of 5 feet 4 inches. The cement bed, together with the upper 

 sections of the quarry, belongs to the Rondout. 



One hundred yards south of Brown's quarry, Mr E. Vroman 

 has opened recently a quarry in the blue limestone strata repre- 

 sented by 2 and 3 of the above section. The rock has a ragged 

 fracture and is so brittle that large blocks can be quarried only 

 with difficulty. Between the two strata there are many some- 

 what flattened forms of a large species of Favosites, much like 

 F. helderbergia e Hall. They are generally incrusted in a 

 covering of shaly material. When the upper layer is removed, 

 the corals can be readily obtained. From the compact portion 

 of the rock the following species were obtained. 



1 Favosites niagarensis ? Hall 



2 Stromatopora concentrica Hall 



3 Camarotoechia neglecta ? Hall 



4 Orthothetes interstriatus Hall 



5 Rhynchonella lamellata Hall 



6 Spirifer crispus var. corallinensis Qrabau 



7 Whitfieldella nucleolata Hall 



