IV BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



Page 



Characteristics of a corrosion conglomerate [abstract] ; by F. W. 

 Sardesox 39 



A pre-Cambrian unconformity in Vermont [abstract] ; by Arthur 

 Keith 39 



Reconnaissance of the Algonkian rocks of southeast Newfound- 

 land [abstract] ; by Arthur Buddington 40 



Sections illustrating the lower part of the Silurian system of 

 southwestern Ontario [abstract] ; by Merton Y. Williams 40 



Evidence of climatic oscillations in the Permo-Carboniferous beds 

 of Texas [abstract] ; by E. C. Case 41 



Geologic history of the Florida coral-reef tract and comparisons 

 with other coral-reef areas [abstract] ; by Thomas Wayland 

 Vaughan 41 



Titles and abstracts of papers presented before the Third Section 

 and discussions thereon 43 



Graphic method of representing the chemical relations of a petro- 

 graphic province [abstract and discussion] ; by Frank D. 

 Adams 43 



Effusive and intrusive in the quantitative classification [abstract] ; 

 by Alfred C. Lane 43 



Change in the crystallographical and optical properties of quartz 

 with rise in temperature [abstract and discussion] : by Fred E. 

 Wright 44 



Mode of formation of certain gneisses in the higlilands of New 

 Jersey [abstract and discussion] ; by C. N. Fenner 44 



Magmatic differentiation and assimilation in the Adirondack 

 region [abstract and discussion] ; by William J. Miller 45 



New point in the geology of the Adirondacks [abstract and dis- 

 cussion] ; by J. F. Kemp 47 



Minerals from the ore deposits at Park City, Utah [abstract and 

 discussion] ; by Frank R. Van Horn 47 



Deepest boring in West Virginia [abstract] : by I. C. White 48 



Presidential address : Pioneers in Gulf Coastal Plain geology : by 



E. A. Smith 48 



Session of Wednesday, December 31 48 



Report of Committee on Photographs 48 



Report of Committee on Geological Nomenclature 49 



Report of Auditing Committee 49 



Amendment to the By-Laws 49 



Bibliography of formation names 50 



Report of the Council 51 



Secretary's report 51 



Treasurer's report 53 



Editor's report 56 



Title and abstracts of papers presented in general session and 

 discussions thereon 58 



Improvements in methods of investigating highly carbonized ma- 

 terials and their bearing on the mode of deposition of coal [ab- 

 stract] ; by Edwajsd Charles J^effbey 58 



