NO. vm. 



LOWER DKVONIC OF MAnYLAKD—SCHlJCMEllT. 



423 



ConiposKf section — Continued. 





4rf. 



M. 



¥■ 



Top of Ontaric. No break in deposition. 



Heavy-bedded solid blue limestone. No fossils seen 34 feet 6 inches. 



A solid blue limestone, filled with a small form of fiypidida near G. 

 gnlcata L . . .2 feet. 



Heavy-bedded impure limestone, with an abundance of Camaroarinus and 

 more rarely Tentnculites gyracanthus, Caltjmene camcrata, and a new species 

 of cystid (1 feet. 



Thin-bedded shaly limestone and .shale deeply weathered. Throughout 

 this zone Sphserocysiites midtifasciatus abounds in great numljcrs with 

 Spirifer modesius, Rhynchondla formosa, etc 37 feet. 



A .solid blue limestone 2 feet 4 inches. 



Thin-bedded shaly limestone like id. Toward the base occur Nuckospim, 

 Shynchonella like campbellana, and Spirifer octocostatus.. .28 feet 6 inches. 

 (The upper part of the following or Pinto section terminates at the Win- 

 chester road, where the lowest Manlius abounds in Cladopora rectilineata, 

 Favosites helderbergix prxcedens, and the brachiopods jiist mentioned.) 



Massive light-gray limestone, becoming more and more nodular toward the 

 top. The only fossil seen is a bryozoan, Cyphotrypa, new species. . .95 feet. 



At base, thin-bedded gray limestone, changing to shales in the upper half; 

 fossils obscure, almost absent 210 feet. 



Thin-bedded dark-blue limestone. Toward the base occur rarely Tcntacn- 

 lites gyracanthus; more commonly Orthothetes, new .species, HhynchoneUa 

 Inmellata, small MeristeUa, Ehynchospira, Murchisonia, and ostracods of the 

 genera Bollia (near B. clarkei of the Niagara) and Kladenia 135 feet. 



Thin-bedded dark-blue limestone, with occasional papery shales; small 

 Meristella and Leperditia. A single plate of Pnlxnxiiiit hitruncata was found 

 here S-"> feet. 



Thin-bedded ribbon limestone weathering into pinnacles; small Mcrisldla 

 and Leperditia like alta common 200 feet. 



Thin-bedded, somewhat crumpled, dark-blue shales with thin bands of 

 limestone .' 50 feet 



Calcareous shales, dark blue in color, with thin bands of limestone, dolo- 

 mite, and occasional sandstones; Leperditia 200 feet. 



Fourth cement rock; Leperditia common 15 feet. 



Blue-gray shales, with thin arenaceous and calcareous layers 16 feet. 



Third cement rock H feet. 



Greenish shales with some calcareous and arenaceotis layers; Ostracoda. 



55 feet. 



Second cement rock; Leperditia and Bollia 18 feet. 



, Massive magnesian limestone toward the to}), with beds of shale toward 

 the bottom ; Ostracoda H feet. 



First cement rock; Bollia, Beyrichia, and Leperditia 9 feet. 



Greenish-gray and mottled dark-brown and olive .sandstones. .3 feet 6 inches. 



Disintegrated yellow rock. First occurrence in this section oi Leperditia, 

 which is abundant along with Bollia near B. clarkei and Octoimria..S feet. 



