GEOLOGY OF SARATOGA SPRINGS AND VICINITY 'J'J 



As far as the part of the Hmestone belt on the Schuylerville sheet 

 is concerned, our collections have shown that one must there sharply 

 distinguish between the dolomite and limestone on one hand, and 

 the conglomerate on the other, for the former have only furnished 

 fossils of Beekmantown age, and the latter such indicating Black 

 river to Trenton age. 



The principal fossiliferous outcrops of the limestones are found in 

 the neighborhood of Middle Falls. The most important one is an 

 old quarry, one-quarter of a mile above the village at the bend of 

 the river, where about 25 feet of highly fossiliferous limestone are 

 exposed. This locality has furnished : 



Cryptozoon sp. 



Girvanella sp. 



Undescribed sponges 



Eccyliopterus planidorsalis Ulrich MS 



E. planibasalis Ulrich MS 



Oxy discus sp. nov. 



Hormotoma? (Murchisonia) cassina {WhitHeld), section 



Segments of trilobites 



A small knoll at the northern outskirt of Middle Falls was found 

 to contain specimens of 



Polytoechia apicalis {Whitfield) 

 cf. Protorthis minima Whitfield 



Along the road from Middle Falls to Bald mountain, dolomite 

 and limestone outcrops are observed on both sides ; one of these, 

 west of the road and halfway between Bald mountain and Middle 

 Falls, contained in the limestone, ostracods (undescribed species of 

 Primitia and Leperditia) and fragments of trilobites. 



The limestone of the Bald mountain quarry contains cephalopods 

 and gastropods, namely : 



Cryptozoon sp. 



Eccyliopterus planidorsalis Ulrich MS 

 E. planibasalis Ulrich MS 

 Liospira? j/>. (section) 

 Cameroceras brainerdi {Whitfield) 

 Cyrtoceras confertissimum Whitfield 



Cephalopod and gastropod sections were also observed in a small 

 quarry on the roadside at the west foot of Louse hill. 



