20 



hank. The whole of the Gray Naples or Cashaqua shales is 

 exposed in this section and the concretions are numerous. 

 Those of the Goniatite stratum are frequently found at the 

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

 by frost action and the disintegration of the bank. The 

 specimens of Goniatitcs in these concretions, as in those oi 

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

 the degree 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 bv 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 bv 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 Stvliolina limestone is about ten inches 

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

 uncommon, while Lunulicardium fragile (Hall) and Stylio- 

 lina fissurella (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- 

 lying 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 Stvliolina limestone. 



From the erosion of the soft Moscow shales the Conodont 

 and Styliolina limestones together project for some distance 



