74 PROCEEDINGS OF THE WASHINGTON MEETING 



age histories of the master streams are still very imperfectly known, but pre- 

 sumably a consequent superimposed origin of the Sweetwater River through 

 the Wind River uplift and of the Green River through the Uinta Mountains 

 accord better with the known facts than the older idea of their antecedent 

 origin. Accidents, in the nature of at least two subcycles within the present 

 cycle, have left their records in river terraces. There were at least two epochs 

 of Pleistocene glaciation during which piedmont glaciers were formed on the 

 peneplained flats of the mountains. 



This paper was illustrated by maps and lantern slides. 



NOMENCLATURE OF FAULTS 

 BY H. F. REID 



i Abstract) 



A committee has been appointed by the Geological Society of America to 

 report on the nomenclature of faults. This is not the report, but the subject 

 is presented here in order to obtain the views and criticisms of the members 

 of the Cordilleran Section. No changes are introduced in the existing nomen- 

 clature, as far as that nomenclature is definite. Where several terms have 

 been used for the same thing a single term is suggested, and where it has been 

 thought advisable to introduce new terms these terms are as simple and as 

 instructive as possible. 



Discussion by Lawson and Wood. 



CORRELATION OF THE TERTIARY DEPOSITS IN THE PACIFIC COAST AND 

 BASIN REGIONS OF XORTH AMERICA 



BY J. C. MERRIAM 



GEOLOGY OF THE NEVADA HILLS 



BY A. C. LAWSON 



(Abstract) 



An account of the geology and ore deposits at Nevada Hills, the principal 

 points of interest being certain analogies with Tonopah on the one hand and 

 with Ely on the other and evidence that the ores were not deposits by ascend- 

 ing solutions. 



SECTION OF THE SHINARUA^ 

 BY A. C. LAWSON 



(Ahutract) 



The paper is a brief description of a stratigraphic section of the Shinarump. 

 nt Parin, southern T'tah. and the relation of that series to the evolution of the 

 Carboniferous platforms and Triassic cliffs of the Grand Canyon region. 



