CattsUll Group of New York. 379 



2. — Fossiliferous band with Scales, bones, and teeth of fishes; 

 Aviculo pectm ? and a few Brachiopoda. (Remains of plants occur 

 a little above the animal remains.) 



3. — Greenish and gray sandstones, shaly sandstones and shales; 

 about 150 feet. 



4. — Fossiliferous band, containing bones and teeth of fishes ; 

 Brachiopoda and Lamellibranchiata, among which the Spirifer 

 mesostrialis, Hall, is abundant, and Cypricardites chemungensis of 

 Vanuxem is common. 



5. — Sandstones and shaly sandstones, similar to those above, 

 but less greenish, and sometimes more heavily bedded ; between 

 100 and 150 feet. 



6. — A fossiliferous band, similar to the one above, with the 

 same species of fossils, and conspicuously marked by a compact 

 argillo-calcareous band with carbonate of iron, and consisting 

 largely of crinoidal remains in small fragments. Crinoidal bands 

 of precisely similar character occur in the Chemung group in the 

 central and western part of the State. 



Y. — Non-fossi lifer ous shale and shaly sandstone, embracing flag- 

 stones aud sandstones ; about 100 feet. 



8. — Red shale and shaly sandstone, with numerous fucoidal 

 remains; 400 to 500 feet. 



9. — Greenish and gray shales and shaly sandstones, with darker 

 shales to the top of the Hamilton group ; the thickness not well 

 ascertained. 



10. — Hamilton group. 



Associated with these fossiliferous beds, and more conspicuously 

 with the upper ones, we have bands of a peculiar greenish shaly 

 conglomerate or cornstone, which likewise contain fish remains. 

 These cornstones, with their fossil remains, were noticed by Mr. 

 Vanuxem in his report upon the adjacent country. 



There is a thickness of between 1,000 and 1,200 feet above the 

 Hamilton group, the lower half of which is not yet known to be 

 fossiliferous beyond the fucoids in the red shaly sandstone. 



This red shaly sandstone and the dark and green shales below, 

 together with the non-fossiliferous beds of No. Y of the section, 

 represent the Portage group; while the upper members are 

 always marked by characteristic fossils of the Chemung group. 



I have carried forward observations across the country from 

 the Susquehanna to the Delaware river, and up to the " head of 

 the Delaware " at Stamford ; and I am satisfied that in the region 



