VI BULLETIN OF TlIK GEOLOGICAL SOCIETY OF AMERir'A 



Page 



Pi'eglacial slope and crest of the Niagara oscai-pment ; by 

 J. W. Spencer 55 



Peueplaiiial affinities of high plateaux of Utah f abstract ] ; by 

 Charles R. Keyes 56 



Shoreline migration and recent coordinate changes in bottom 

 topography at Toint Pelee, Lake Erie [absti-act] ; by K. M. 

 Kindle. . , 57 



Experiments on tlie formation of esl<ers and kames | ab- 

 stract] ; 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. 

 Washington 58 



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

 Sayles 59 



Metamorpbism in meteorites [abstract] ; by George P. Mer- 

 rill G2 



Porpliyritic granitic gneisses, interpreted as lit-par-lit injec- 

 tions of scliists [abstract] ; by James F. Kemp 63 



Origin of Adirondack magnetite deposits [abstract] ; by Wil- 

 liam J. Miller 63 



Magnetites of North Carolina — their origin [abstract and 

 discussion] ; by William S. Bayley .• • • • ^ 



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

 [abstract] ; by W. A. Tabr 66 



(Jeologic history of the Corocoro copper district, Bolivia [ab- 

 stract] ; by Joseph T. Sing'Ewald, 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 Wheeler and Lehman Cave, White Pine County, Ne- 

 vada [abstract] ; by John B. Hastings 69 



Geological notes on Palestine [abstract and discussion] ; by 

 R. W. Brock 70 



Final stage in the physiographic evolution of the San Juan 

 Mountains [abstract] ; by Wallace W. Atwood 70 



Tertiary history of the lower Snake River Valley, southwest- 

 ern Idaho [abstract] : by John P. Buwalda 71 



Physiographic diagram of the United States [alistractj : by 

 Akmin Kohl Lobeck 71 



True sphere of petrology [abstract] ; by Charles P. Berkey. 72 



