IV BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



Page 

 Ozark Mountains in Missouri [abstract] ; bj' James H. 

 Gardner 66 



Preliminary paper on recent crustal movements in the Lake 

 Erie region [abstract and discussion] ; by Charles E. 

 Decker 66 



Quaternary deformation in southern Illinois and southeastern 

 Missouri [abstract]; by Elgene Wesley Shaw 67 



Old shorelines of Mackinac Island and their relations to the 

 lake history [abstract] ; by Frank B. Taylor 68 



Some peculiarities of glacial erosion near the margin of the 

 continental glacier in central Illinois [abstract and discus- 

 sion] ; by John L. Rich 70 



New evidence of the existence of fixed anticyclones above 

 continental glaciers [abstract] ; by William Herbert 

 HOBBS 73 



Origin of Monks mound [abstract] ; by A. R. Crook 74 



Can U-shaped valleys be produced by removal of talus? [ab- 

 stract] ; by Alfred C. Lane 75 



Physiographic studies in the driftless area [abstract] ; by 

 Arthur C. Trowbridge 76 



Hemicones at the mouths of hanging valleys [abstract] ; by 

 Charles E. Decker 76 



Block diagrams of state physiography [abstract] ; by A. K. 

 LOBECK 77 



Kilauea, a drop-fault crater [abstract] ; by George Carroll 

 Curtis 77 



Age as the determinant of character in volcanoes [abstract] ; 

 by George Carroll Curtis 78 



Comprehensive coral island theory [abstract] ; by George 

 Carroll Curtis 78 



Evidence of continental glaciation on Mount Katahdin [ab- 

 stract] ; by George Carroll Curtis 78 



Naturalistic land model, the "last word in geology" [ab- 

 stract] ; by George Carroll Curtis 79 



Second Section 81 



Titles and abstracts of papers presented before the Third Section 

 and discussions thereon 81 



Pre-Cambrian igneous rocks of the Pennsylvania Piedmont 

 [abstract] ; by F. Bascom 81 



Magmatic assimilation [abstract] ; by F. Bascom 82 



Hypersthene syenite (akeritel of the middle and northern 

 Blue Ridge region, Virginia [abstract] ; by Thomas Ij. 

 Watson and Justus H. Cline 82 



Pyrrhotite, norite, and pyroxenite from Litchfield, Connecti- 

 cut [abstract] ; by Ernest Howe 83 



Some effects of pressure on rocks and minerals [abstract and 

 discussion] ; by John Johnston S3 



Primary chalcocite in the fluorspar veins of Jefferson County, 

 Colorado [abstract] ; by Horace B. Patton 84 



