2;]G NEW voKK si\\ri: mtskum 



('li(ij)trr 5 



CHARACTERISTIC SECTIONS IN THE SCHOHARIE REGION 



The following sections are given to bring out the detail of the 

 stratigraphy of the Schoharie region. 



Several of the sections have previously been published, among 

 these the detailed section of the Hamilton and Upper Devonie 

 strata made by Prosser. This indefatigable worker in the Pale- 

 ozoic stratigrai)liy of eastern United States has put all students of 

 that subject under lasting obligations by his extensive and de- 

 tailed investigations of the succession of strata and the distri- 

 bution of species in these regions. 



Pros-ser-s sections are freely reproduced in this chapter with 

 such slight modifications as were desirable to bring them into 

 harmony of arrangement with the general plan of this work^ 



1 Section of the old Brown quarry of Schoharie - 

 This abandoned quarry is in the hollow between the cemetery 

 and the road leading east from Schoharie postoffice. The cpiarry 

 wall described is just to the north of the road and wholly below it. 



Near the BroAvn quarry, 14 mile southeast of the Schoharie post- 

 office, the Sa.lina (Brayman) shales are exposed by the roadside. 

 In the quarry there is exposed the basal memiber of the Cobleskill, 

 38 inches thick. This layer is hard and compact and except where 

 weathered, fossils can be obtained from it only with difticulty. 

 This la,^-er is followed by one IG inches thick, locally known as the 

 marble layer on account of the beautiful polish which it takes. 

 The marble layer is followed by thin layers 1 to 3 inches thick, 

 having a somewhat sandy texture and quite fossiliferous. 



The faunas from the different layers vary somewhat. In the 

 thin layers at the top C a m a r o t o e c h i a? 1 a m e 1 1 a t a is 

 very abundant and an undetermined s])ecies of Peyrichia occurs 

 in large numbers. C h a e t e t e s s]). and T e n t a c 11 1 i t e s 

 sp. uiidet. ;\v(^ also found in the thin layers. From the basal layerj 

 a single specimen of L e p t a e n ji r h o m b o i d a 1 i s has Iveen ^ 

 ()])taine(l. This s];ecies was also found at Ularke's cave west ol 

 Scholia ri(^ It is however very rare in the Cobleskill of Schoharie 



C()lllll\'.- 



1 Prof. Prosser has most courteou.sly revised all his sections for this work 

 so as to embody the results of his latest studies. 



2Hartnagel/c'. A. N. Y. State Mus. liul. (iO. 1908. ]). 1120-21. 



