Geology and Mineralogy 147 



rocks to the interpretation of the original planes of sedimentation, 

 and therefrom their present deformation. The author says "the 

 key to the structure is in the distinction between cleavage folia- 

 tion and stratification." He has not only recognized means of 

 detecting these latter by the former, but has produced beautiful 

 illustrations of the principal types of the phenomena, and has 

 formulated a number of general rules for their practical applica- 

 tion which have served him in interpreting the original strati- 

 graphical sequence and their present structural relations of the 

 Graylock mountain series. His paper is further enriched by 

 numerous plates illustrating the topography and geological sec- 

 tions of the region. 



The three papers together constitute a valuable illustration of 

 modern methods of conducting geological correlation in regions 

 where fossils fail and original structure is masked by later 

 metamorphism. h. s. w. 



4. The Geological Society of America. — The eighth annual 

 meeting was held in Philadelphia, Pa., beginning Thursday, 

 December 26, 1895, in the Art Department, University of Penn- 

 sylvania. The officers of the Society elected for the year 1896 

 are as follows : President, Joseph LeConte, California ; First 

 Vice-President, Charles H. Hitchcock, New Hampshire ; Second 

 Vice-President, Edward Orton, Ohio ; Secretary, H. L. Fairchild, 

 New York; Treasurer, I. C. White, West Virginia; Editor, 

 J. Stanley-Brown, Washington, D. C. ; Councilors, B. K. 

 Emerson, Amherst, Mass., J. M. Safford, Nashville, Tenn. 



At the opening session memorials of the four fellows whose 

 death occurred during the past year were read. The memorial of 

 James D. Dana was prepared by Joseph LeConte, that of Henry 

 B. Nason by T. C. Chamberlin, that of Albert E. Foote by 

 George F. Kunz, and that of Antonio del Castillo by Ezsquiel 

 Ordonez. 



At the several sessions the following papers were presented : 



George P. Merrill : Disintegration and decomposition of diabase at Med- 

 ford, Mass. 



Charles R. Keyes : The geographic relations of the granites and porphyries 

 in the eastern part of the Ozarks. 



J. P. Kemp : Illustrations of the dynamic metamorphism of anorthosites and 

 related rocks in the Adirondacks. 



N. S. Shaler : The importance of volcanic dust and pumice in marine deposits ; 

 The relations of geologic science to education (Presidential address). 



L. V. Pirsson : A needed term in petrography. 



John J. Stevenson: The Cerrillos coal field of New Mexico. 



W. M. Davis: Note on the outline of Cape Cod ; Plains of marine and sub- 

 asrial denudation. 



F. P. Gulliver: Cuspate fore-lands. 



M. R. Campbell: Drainage modifications and their interpretation. 



N. H. Darton : Some fine examples of stream robbing in the Catskill Moun- 

 tains ; Notes on relations of lower members of coastal plain series in South 

 Carolina ; Resume of general stratigraphic relations in the Atlantic coastal plain 

 from New Jersey to South Carolina. 



Robert Bell : Proofs of the rising of the land around Hudson Bay. 



C. R. Tan Hise : Movements of rocks under deformation. 



