THE SECTION AT SCHOHARIE, N. Y. 367 



Tentaculite limestone. 



1. Limestone, bluish, irregularly bedded, layers 2" 



to 4" thick 2' 6" 



2. Limestone, bluish, irregularly bedded, often 



sub -concretionary, the layers separated by very 



thin shales 13' 6" 



3. Limestone, deep blue, in two layers, 2' 3" and 



2' 6", separated by 2" of clay, massive, brittle, 

 conchoidal fracture, fetid odor 4' 11" 



4. Limestone, thin layers with laminae of shale... 5' 



5. Limestone, blue to bluish-black, massive 2' 5" 



6. Limestone, bluish, irregular, sub-concretionary 



structure 2' 



7. Limestone, thin bedded, with laminae of shale 5' 8" 



8. Limestone, in layers about i" thick i' 



9. Limestone, bluish-black, ragged fracture, mas- 



sive, in three layers 8' 5" 



in all 45' 5'^ thick. 



This section is seen in an almost continuous exposure on the 

 east side, where quarries have been worked for a quarter of a 

 mile below Schoharie village, and there are many partial ex- 

 posures within half a mile above the village. The only com- 

 plete exposure on the west side is along the road ascending 

 West Mountain. Occasional outcrops were seen on Foxkill and 

 Cobleskill east and west from the Schoharie and the great quar- 

 ries at Howe's cave exhibit the same order. At one time, the 

 massive beds were quarried either for building or for ornamental 

 stone, but they are used no longer, as planes of bedding developed 

 on exposure and caused unsightly seams. The weathered sur- 

 faces in the quarries show that the massive beds are laminated 

 though the surface of fresh fracture shows no trace of such 

 structure. 



The lowest bed was quarried most extensively as it yields 

 blocks of large size. The rock is brittle, rings when struck but 

 has a very ragged fracture. Fossils are comparatively rare, only 

 Spirifcr venuxeini and Leperditia alta having been seen. But 

 the half-burned rock is clearly a mass of fossils, mostly of the 



