EARLY DEVONIC HISTORY OF NEW YORK AND EASTERN NORTH AMERICA I I 



III ascending order: 

 South. 



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

 overlain by 



FEET 



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



t a e n a rhomboidalis and in the lowest stratum corals 

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



2 Gray to yellowish hard calcareous shales with thin beds of 



limestone - - . . . . -121; 



3 Hard blocky yellowish gray argillaceous limestone - - - 40 



4 Coarse conglomeratic ash bed I2 



5 Compacted gray blocky limestone Io 



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, 15 feet in hight and apparently entirely embedded 

 in the volcanic matter. This mass contains corals and 

 brachiopocls - , Q 



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 - - - . . _ yc 



10 Soft shales with lamellibranchs 10 



1 1 Ash beds alternating with thin limestones and shales all highly 



fossiliferous, the ash beds containing Rensselaeria 



stewarti in abundance - - , o 



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



13 Ash bed with Rensselaeria stewarti - - - . r 



14 Barren shales IE . 



15 Thin white limestone ---.... It . 



