4 PROCEEDINGS OF THE CHICAGO MEETING 



Page 

 Preglacial slope and crest of the Niagara oscarpuient ; Ijy J. W. 



Spencer 55 



Peneplainal affinities of high plateaux of Utah [abstract] ; by 



Charles R. Keyes 56 



Shoreline migration and recent coordinate changes in bottom to- 

 pography at Point Pelee, Lake Erie [abstract] ; by E. M. Kindle 57 

 Experiments on the formation of eskers and kames [abstract] ; 



by Herdman F. Cleland and Paris B. Stockdale 57 



Sectional meeting, Wednesday afternoon 57 



A significant petrographic unconformity [abstract] ; by Charles P. 



Berkey 58 



Rocks of Kohala and Kea, Hawaii [abstract] ; by Henry S. Wash- 

 ington 58 



Microscopic sections of till and stratified clay ; by Robert W. 



Sayles 59 



Metamorphism in meteorites [abstract]; by George P. Merrill... 62 

 Porphyritic granitic gneisses, interpreted as lit-par-lit injections 



of schists [abstract] ; by James F. Kemp 63 



Origin of Adirondack magnetite deposits [abstract] ; by William 



J. Miller 63 



Magnetites of North Carolina — their origin [abstract and discus- 

 sion] ; by William S. Bayley 64 



Cobalt - nickel - copper - lead deposits of Fredericktown, Missouri 



[abstract] ; by W. A. Tarr 66 



Geologic history of the Corocoro copper district, Bolivia [ab- 

 stract] ; by Joseph T. Singewald, Jr., and Edward W. Berry. . . 66 

 Some conclusions in regard to the origin of gypsum [abstract and 



discussion] ; by Frank A. Wilder 67 



Flooding of oil wells by fresh water [abstract] ; by Thomas C. 



Brown 67 



Annual dinner 68 



Session of Thursday morning, December 30 69 



Titles and abstracts of papers presented at the morning session and 



discussions thereon 69 



Mount Wlieeler and Lehman Cave, AVhite Pine County, Nevada 



[abstract] ; by John B. Hastings 69 



Geological notes on Palestine [abstract and discussion] ; by R. W. 



• Brock 70 



Final stages in the physiographic evolution of the San Juan 



Mountains [abstract] ; by Wallace W. Atwood 70 



Tertiary history of the lower Snake River Valley, southwestern 



Idaho [abstract] ; by John P. Buwalda 71 



Physiographic diagram of the United States [abstract] ; by Armin 



Kohl Lobeck 71 



True sphere of petrology [abstract] ; by Charles P. Berkey 7l' 



Volcanology of the Hawaiian Islands [abstract] ; by Henry S. 

 Washington 72 



