3UG NEW YUlilv STATE .MLijLUM 



Feet 



Port Ewcn 30-150 



8ili('io argillaceous liuic sandrocks and liiiie mud- 

 rocks, often pvi'itiftn'ons. A well marked concre- 

 tionary (or conj^'loiueralic ?) slrudui-e is seen in 

 the typical locality on the cut of the West Shore 

 railroad near the Wilbur l)ridi;e. These nodules 

 of lime mark tlie IxMlding i)lane and ihey readily 

 weather away lea\inji- lar^c ca^■ilies. hi these 

 hollows silicitled fossils are oflen louiid. Among 

 the commoner sjjocies are: 



Leptaona rliomboidalis {Wilck.) c 

 Atrypa reticularis Linne a 

 Stroplionella leavomvorthana Hull c 

 Dalniaiiella perelogaiis Hall c 

 Ortliothetes woohvorthaniis {I fall) c 

 Si>irifer perlamellosus Hall c 

 Khipirlomella oblata Hall c 

 Meristella laevis ( l'«>n/jc»/) c 

 Unc-inulus caiiiphollaniis (Hall) c 

 Phacops logani Hall c 

 Cliaetetes sp. ? c 

 Hindia fibrosa (Rocmcr) c 

 Tentaculites elougatus Hall c 

 Anastrophia cf. verneuili {H((ll) 

 Spirifer concinnus Hall c 

 Acidaspis tuberculatus Hall c 



The maximum thickness is at Port Ewen. 



Becraft limestone 40 



Massive bedded lii>ht colored lime sandrock, often 



becoming a shell limestone of great ]mrity and 



consisting of brachiopod shells and crinoids. The 



lower beds are more argillaceous, being a transition 



from the New Scotland Indow. The middle IS or 



20 feet range from 94 to 97;^ calcium carbonate. 



The last recorded outcrops of this rock are below 



nigh Falls. From the Rondout region van Ingen 



and Clark record the following species: 



I ppc)- portion 

 Sit'bcrclla psciulogah^ata //(/// a 

 Atrypa reticularis J/innc a 

 Spirifer concinnus Hall a 

 Kliiliidoniella o])lata Hall c 

 C'rinoid fragments a 

 Stropboodonta arata Hall r 

 Lei»ta(Mia rliomboidalis {^yilrlc.) c 

 Nucleospira ventricosa Hall c 

 Spirifer porlamellosus Hall c 

 Oriskania (?) .vp. ? r 



Middle portion 

 Aspidocrinus scutelliforniis Hall aa 

 Spirifer concinnus Hall aa 



