372 MARINE EXUVLE EXPOSED BY 



Terebratulas. 

 Pectinites. 

 Ostreas. 

 Cardiums. 



An Echinus, with its radiated prickles, or something 

 resembling it. 



Near the village of Claverack, is a large mass of cal- 

 carious rock, resembling a hill at a distance. It abounds 

 with shells and their impressions. The foundation of 

 the old court-house at Claverack, was built of the stone 

 abounding in these petrifactions. The relicks here are 

 mostly bivalve, being terebratulas, pectens, and some 

 singular other forms. 



To Peter Wynkoop, Esq. I am indebted for the black 

 marble, quarried from the strata westward of Kingston, 

 and replete with marine shells. 



In Greene county, one hundred miles from the Atlantic 

 coast, organic remains are found. Those brought by 

 Mr. Frederic W. Porter, from the farm of Stephen Platt, 

 Esq. at the village of Freehold, fifteen miles west from 

 Hudson river, are the shells (not merely impressions) of 

 pectens, terebratulas, and cardiums, bedded in a heavy 

 and compact sort of siliceous clay, charged with brown 

 oxyd of iron. 



The like are found imprinted in clay-grit, or a sort of 

 silico-argillaceous lumps, scattered over the farms for 

 several miles north and south of Poughkeepsie ; in many 

 instances, the shells are wasted away, and the cavities they 

 occupied, remain, together with their sizes and shapes. 



The whole region watered by the Wallkill is scattered 



