EARLY DEVONIC HISTORY OF NEW YORK AND EASTERN NORTH AMERICA II 



In ascending order : 



So u tli. 



Volcanic boss making southern slope to sea plain of a low headland 

 overlain by FEET 



i Calcareous shale with S i e b e r e 1 1 a pseudogaleata, L e p- 

 taena rhomboidalis and in the lowest stratum corals 

 (Favosites, Zaphrentis etc. ) No contact metamorphism - 30 



2 Gray to yellowish hard calcareous shales with thin beds of 



limestone - - - - - - - - - I2 5 



3 .Hard blocky yellowish gray argillaceous limestone - - - 40 



4 Coarse conglomeratic ash bed - - - - - - 12 



5 Compacted gray blocky limestone - - - - - 10 



Volcanic boss, 900 feet in section, near the middle of which lies a 



6 detached mass of hardened and glazed calcareous shale resting 



at an angle to the normal dip, measuring 30 feet in transverse 

 thickness, 1 5 feet in hight and apparently entirely embedded 

 in the volcanic matter. This mass contains corals and 

 brachiopods - - -- - - - - - -30 



7 Compacted limestone beds overlying the eruptive; contains 



corals and other fossils ------- 7 



8 Soft calcareous shales lying at the entrance of a small stream 



and very rich in Leptaena rhomboidalis - - - 20 



9 Limestones and calcareo-argillaceous shales with profusion of 



corals and brachiopods ... - - 75 



10 Soft shales with lamellibranchs - - - - - - 10 



11 Ash beds alternating with thin limestones and shales all highly 



fossiliferous, the ash beds containing Rensselaeria 

 Stewart i in abundance ----- - 30 



12 Blocky calcareous shale with gastropods (Coelidium) - - - 2 



1 3 Ash bed with Rensselaeria stew arti - - - - 1 



14 Barren shales - - - - - - - - - _I 5 



15 Thin white limestone - - - - - - - - 1.5 



