1914] Buivalda: Tertiary Mammal Beds in West-Central Nevada 363 



It seems probable that Gabbs Valley has been receiving the erosion 

 products from Stewart Valley, and Big Smoky Valley those from 

 lone Valley, since the first uplift of the Stewart and lone valleys at 

 about the end of the Miocene and that they therefore contain, buried 

 beneath the Eecent accumulations, a continuous series of upper Mio- 

 cene, Pliocene, and Pleistocene deposits. 



Transmitted December 26, 1913. 



