y1_(rc of llic PI. ricasanl /Infs. loi 



I'ect. In. 



in its structure, j)ortions peeled off lia\-iu,L:^ a couchoidal 

 fracture. The fossils observed in the ravine were also 

 v-isi])le in this large mass. 



Covered 6 4 



Ivitnestone and slialc, 5 8 



A heavy layer of limestone about N inches thick occurs 

 about a foot from the top, underlain by a foot of shale. 

 The rest is limestone in broken courses. 



Limestone and shale, 5 S 



This interval contains waved limestone layers and 4 

 beds of shale, 10 inches, 8 inches, 10 inches and 6 inches 

 thick respectively. The limestone contains quantities 

 of corals, brachiopods, and fragments of Asap/ms. In 

 one of the laj'ers, Strop/ionicna altcr^iata, Monticiilipora 

 viamillata and stems of Glyptocrinus occur. Fig. i, pi. 

 3, shows the character of the strata in this section. 



Limestone and shale 5 S 



In this series the limestone is in broken courses of 

 varying thickness, and with a few thin seams of shale. 

 It forms a series of steps in the stream bed. On the 

 bank, about midway, is a large slab of rock i foot 8 in- 

 ches thick, 3 feet 10 inches wide and 4 feet 10 inches 

 long, upon the surface of which were specimens of 

 SfrophoDicua altcrnata, Orthoceras with septa Y^ of an 

 inch wide, Orf/iis, Zygospira and a Murchisoiiia like 

 M. orarilis. Fig. 2, pi. 3, shows the character of the sec- 

 tion, with the large slab of rock on the bank at the right. 



Limestone and shale, i 6 



The limestone is in thin courses, and more or less 

 waved. The shale lies between broken courses below 

 and a heavy waved course above, formed of finely com- 

 minuted material. The top forms the approximate bot- 

 tom of the quarry opening on the eastern side of the 

 ravine. 



Limestone, i 6 



Concealed, 20 — 



It is impossible to give the character of this portion 



