GEOLOGY AND PALEONTOLOGY OF THE SCHOHARIE VALLEY 229 



evidence points to an invasion from the soutli, through the 

 " Indiana basin ". [See map, fig. 186]. 

 Clarke sajs in regard to this fauna -} 



The east presents in the arenaceous beds of the Cauda galli 

 [Esopus] and Schoharie grit a facies which is not elsewhere seen. 

 In clastic character, there is excellent reason for associating 



Fig. 186 Paleogeographic map of Onondaga time. (After Schuchert) 



these beds directly with the deposition of Oriskany sediments as a 

 closing stage thereof, and indeed several elements of the striking 

 Schoharie fauna indicate derived relations to the Oriskany. 

 This might be predicated of the trilobites specially, of the 

 brachiopods and lamellibranchs in part, but not of the most 

 conspicuous element of the fauna, the cephalopods. For the 

 origin of the latter we have yet to search; they may have entered 

 New York from the west; with the fauna of the limestone and 



'N. Y. State Mus. Biil. 52. 1902. p. 667. 



