﻿12 Bulletin 17 . 20 



N. 65-66 of notes. Part of A a , P. & C. 



L,ithological character the same as M. Well exposed in cliff 

 on west side of the creek near the railroad bridge at Trenton 

 Chasm station. Zone of Rafinesquina deltoidea. 26 ft. = 226 

 ft. 10 in. 



Lingula, sp., rr, Zygospira recurvirostris, r, 



Dalmanella testudinaria, z., A saphus platycephalic s, r, 



Platystrophia lynx, c, Leperditia sp., r, 



Rafinesquina altemata, r, Monticulipora lycoperdon, rr, 



R. deltoidea, aa, Crinoid columns, c. 

 Plectambonites sericeus, c, 



O. 67 of notes. Top of A 8 , P. &. C. 



Fairly pure, light gray, semi-crystalline limestone in one to six 

 inch layers. Extends to the base of the heavy bedded crystalline 

 rock, and belongs to the same faunal zone with it. Second zone 

 of Platystrophia lynx. 17 ft. = 243 ft. 10 in. 



Dalmanella testudinaria, a, Plectambonites sericeus, c, 



Platystrophia lynx, a, Bellerophon bilobatus, rr, 



Rafinesquina altemata, r, Asaphus platycephalus, r, 



R. deltoidea, r, Monticulipora lycoperdon, r. 



P. 68 of notes. A g of P. & C. 



Light gray, coarsely crystalline, heavy bedded limestone, made 

 up largely of the comminuted fragments of brachiopods and cri- 

 noid columns. Well exposed in several quarries between Trenton 

 Chasm station and Prospect. 26 ft. = 269 ft. 10 in. 



Lingula, sp. , rr, Asaphus platycephalus, c, 



Trematis terminalis , rr, Calymene senaria, rr, 



Dalmanella testudinaria, c, Ceraiirus pleurexanthemus , r, 



Platystrophia lynx, c, Stictopora, sp., c, 



Rafinesquina altemata, r, Monticulipora lycoperdon, c, 



R. deltoidea, c, Conularia trentonensis, rr, 



Plectambonites sericeus, r, Crinoid columns, a. 

 Zygospira recurvirostris, r, 



