LV BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



Page 



Intraformational corrugated rocks [abstract and discussion] ; 

 by William J. Miller OS 



Structure of the pre-Pennsylvanian rocks of the Big Stone 

 Gap area, Wise County, Virginia [abstract] ; by George W. 

 Stose 98 



Relation of deep-seated faults to surface structure in the 

 region northeast of the Yellowstone Park Plateau [ab- 

 stract] ; by W. T. Thorn, Jr 09 



Possible tillite at Levis, Quebec [abstract] ; by Robert W. 

 Sayles 99 



Stages of the Ice Age [abstract] ; by Warren Upham 100 



Glacial formations on the Coteau des Prairies [abstract and 

 discussion] ; by Frank Leverett 101 



What constitutes the Altamont moraine? [abstract] ; by 



Frank Leverett 102 



Sectional meeting of Wednesday afternoon 104 



Titles and abstracts of papers presented before the afternoon 

 session and discussions thereon 104 



Value of the physical characters of sand grains in the inter- 

 pretation of the origin of sandstones [abstract and discus- 

 sion] ; by J. J. Galloway 104 



Red limestones and their geologic significance [abstract] ; by 

 J. J. Galloway 105 



Petrographic studies of some New York sediments [abstract] ; 

 by Harold L. Alling 107 



Life eras before the Cambrian [abstract] ; by Charles R. 

 Keyes 107 



Quantitative study of the derivation of North American 

 Algonkian sediments [abstract] ; by Arthur C. Trowbridge 

 and Waldo S. Glock 10S 



Cambro-Ordovician section near Mount Robson, western 

 Canada [abstract] ; by Lancaster D. Burling 108 



Trenton of central Tennessee and Kentucky [abstract] ; by 

 Percy E. Raymond 109 



Stratigraphy of the crystalline schists of Pennsylvania and 

 Maryland [abstract and discussion] ; by Eleanor Bliss 

 Knopf and Anna I. Jonas 110 



Proposed new nomenclature of the Appalachian Coal Meas- 

 ures [abstract and discussion] ; by George H. Ashley Ill 



Revision of the Paleozoic Systems. Part II : The Ordovican 



System [abstract and discussion] ; by E. O. Ulrich 112 



Session of Wednesday evening 112 



Presidential address and smoker ; 112 



After effects of igneous intrusion [title] ; Presidential address 



by James F. Kemp 113 



Session of Thursday, December 29 113 



Report of the Auditing Committee 113 



Symposium on isostasy 113 



