716 ABSTRACTS OF PAPERS 



Page 

 Pleistocene of the vicinity of Sioux Falls, South Dakota [abstract] ; by 



B. Shimek 730 



Pleistocene of the vicinity of Omaha, Nebraska, and Council Bluffs, Iowa 



[abstract] ; by B. Shimek 730 



Lessons of the Little Yosemite Valley [abstract] ; by F. E. Matthes^ 730 



Two glaciers in Alaska [abstract and discussion] ; by Lawrence Martin . . 731 

 System of Quaternary lakes in the Mississippi basin [abstract and discus- 

 sion] ; by E. W. Shaw 732 



Radiation of glacial flow as a factor in drumlin formation [abstract and 



discussion] ; by William C. Alden 738 



New method of calculating the date of the Glacial epoch [abstract] ; by 



Ruf us M. Bagg, Jr 735 



Physiographic studies in the San Juan District of Colorado [abstract and 



discussion] ; by Wallace W. Atwood. 735 



Geographical descriptions in the folios of the Geologic Atlas of the United 



States [abstract] ; by W. M. Davis 736 



Quantitative classification of meteorites [abstract] ; by Oliver C. Farring- 



ton 736 



Moldavite question [abstract] ; by George P. Merrill 736 



Clinton sand as a source of oil in Ohio [abstract and discussion] ; by J. A. 



Bownocker 736 



Geological relations of oil pools situated in regions of monoclinal structure 



[abstract and discussion] ; by Frederick G. Clapp 737 



Geology of the Chibougamau region, Quebec, Canada [abstract] ; by Alfred 



Ernest Barlow 738 



Occurrence of silver, copper, and lead ores at the Veta Rica mine, Sierra 



Mojada, Coahuila, Mexico [abstract] ; by Frank R. Van Horn 738 



LIST OF UNDERGROUND TEMPERATURES IN THE UNITED STATES 

 BY N. H. DARTON 



(Abstract) 



This list includes data collected during the past fifteen years by the author 

 and his associates in various portions of the United States. Several hundred 

 observations have been made in deep borings with a self-recording thermom- 

 eter of special type. All other available data have been compiled to make 

 the list as complete as possible. The rate of temperature increase has been 

 found to be very variable, but in places there is a marked relation to geologic 

 features. 



UNUSUAL DISTORTION OF THE LOWER KITTANNING GOAL 

 BY RICHARD R. HICE 



(Abstract) 



. Of the whole Allegheny series in western Pennsylvania, no horizon is more 

 regular and continuous than the Lower Kittanning coal ; indeed, with its ac- 



