GEOLOGY AND PALEONTOLOGY OF THE SCHOHARIE VALLEY 235 



from a new fauna arriving from Eurasia by way of a passage 

 opened to the Pacific across the northwestern states and terri- 

 tories; but later it was forced into competition with that same 

 fauna. This was the European Intumescens fauna, rich in 

 goniatites, cardioconchs and other types. 1 The beds carrying 

 this fauna have been named the " Naples beds " by Clarke. They 

 are not found in the Schoharie region where the Sherburne and 

 Ithaca beds represent them. The latter are succeeded in this 

 region by the red sediments of the Oneonta. Going westward 

 these covering red beds appear later and later, the beds with the 

 Ithaca fauna continuing higher till the whole of the marine 

 Portage is present. Marine sedimentation continued in the 

 southwestern part of New York beyond the close of Chemung 

 time, when the nonmarine red phase of deposition, which in the 

 eastern region resulted in the formation of the Catskill beds, 

 finally reached that district probably after Pocono beds had been 

 forming for some time in the Appalachian district. 



References 



Clarke, J. M. The Naples Fauna. N. Y. State Mus. Mem. 6. 1904. 



■ Marcellus Limestones of Central and Western New York and their 



Fauna. N. Y. State Mus. Bui. 49. 1901. p. 115-38. 

 The Indigene and Alien Faunas of the New York Devonic. X. Y. 



State Mus. Bui. 52. 1902. p. 072. 

 Schuchert, Charles. On the Faunal Provinces of the Middle Devonic of 



America and the Devonic Coral Snb-province of Russia with two Paleo- 



graphic Maps. Am. Geol. 1903. 32 :137-G2. 

 Ulrich, E. 0. & Schuchert. Charles. Paleozoic Seas and Barriers in Eastern 



North America. X. Y. State Mus. Bui. 52. 1902. p. 033-63. 



Ulrich and Sclmchert have suggested that this fauna came in from the 

 Atlantic, but the character of the sediments in the east shows that this 

 could not have been the case, since the deposits are all of the shallow water 

 and continental type, indicating a continuous shore line along the east 

 and south. 



