ABSTRACTS OF PAPERS 147 



malian fauna consists of a camel, possibly Pliauchenia, an advanced type of 

 horse related either to Pliohippus or to Equus, and a rhinoceros. The fauna 

 suggests that the deposits are of Pliocene age. The mammal-bearing sediments 

 of Meadow Valley may be known as the Panaca beds. 



Approximately 80 miles south of Panaca, in Meadow Valley, a second series 

 of mammal-bearing deposits is exposed, in Muddy Valley. These beds are 

 mapped by Spurr as Pliocene. Between the villages of Overton and Logan, 

 Lincoln County, Nevada, and on the southwest side of the Muddy River, the 

 deposits consist of well indurated sands and clays, red or light brown in color. 

 They rest unconformably on a series of beds that are presumably of early 

 Tertiary age. The mammal-bearing sediments of Muddy Valley are also ter- 

 raced. In the well indurated sands and clays a small collection of mammalian 

 remains was secured. Camels and apparently a horse are the only members 

 of this Tertiary fauna. The forms differ from those found in the Panaca 

 beds. The faunal difference suggests that the northern and southern deposits 

 are not of same age. Possibly the mammal-bearing beds of Muddy Valley, 

 which may be designated the Muddy Creek beds, are earlier in age than the 

 Panaca deposits. 



CORRELATION OF THE E 31 PI RE FORMATION, OREGON 

 BY HENRY V. HOWE 



(Abstract) 



1. The Empire fauna is Lower Pliocene in age because the Wildcat, Merced, 

 Purissima, and other Lower Pliocene formations of California, whose position 

 in the Tertiary is already recognized, contain many highly ornamented species 

 of mollusca common to the Empire. Pliocene age of the Empire is indicated 

 also by the presence of the genus Dendraster. 



2. The Coos conglomerate, lying with irregular contact on the Empire beds, 

 is also of Pliocene age. 



OBSERVATIONS ON THE SKELETON OF THE CAVE BEAR. ARCTOTHERIUM 

 BY JOHN C. MERBIAM 



CORRELATION AND PALEOGEOGRAPHY OF THE MARINE TERTIARY DEPOSITS 



OF THE WEST COAST 



BY BRUCE L. CLARK 



(Abstract) 



The introduction to the paper considers the methods and principles of corre- 

 lation applied to the problem of marine beds of the Pacific coast. The main 

 part of the paper will discuss a proposed tentative correlation table, with ac- 

 companying paleogeographic maps. 



