20 



bank. The whole of the Gra}' Naples or Cashaqua shales is 

 exposed in this section and the concretions are numerous. 

 Those of the Cioniatite stratum are frequently found at the 

 foot of the section, where they have fallen on being loosened 

 b}^ frost action and the disintegration of the bank. The 

 specimens of Goniatites in these concretions, as in those of 

 Section 1, are much compressed, and only the outline and 

 the degTee of involution of the respective species are as a rule 

 discernable. 



The Genesee shales show the same characteristic as in 

 Section 1. The upper bituminous portion projects in masses 

 bounded by joint planes, and where these masses have fallen 

 after the removal of the support, smooth walls remain, on 

 which frequently may be observed an efflorescens of alum. 

 The shales usually present the rusty surfaces on their 

 laminae which result from the oxidation of the pyrite. The 

 lower portion of the Genesee is, as everywhere in this region, 

 represented by about eight feet of grayish shale with a few 

 bituminous bands, and grades below into the Styliolina 

 band. This has much the character noticed at Section 1, 

 except that the Styliolina limestone is about ten inches 

 thick. In the black shale of the "band" spores are not 

 uncommon, while Lunulicardium fragile (Yi&\\) and Stylio- 

 lina £ssiirella (Hall) are the only other abundant fossils. 

 The Conodont limestone is chiefly represented in the up- 

 stream end of the section. Here it is about three inches 

 thick, less compact than at Section 1, and rich in crinoid 

 joints, which on the weathered surfaces stand out in relief. 

 This causes the rock to contrast strongly with the over- 

 hang Styliolina limestone, which always has a dissolved 

 appearance, owing to the uniformity of its texture. Near 

 the middle of the section, the Conodont bed dwindles in 

 thickness to less than an inch, and finally appears only as a 

 thin coating on the under side of the Styliolina limestone. 



From the erosion of the soft Moscow shales the Conodont 

 and Styliolina limestones together project for some distance 



