RECORDS OF MEETINGS 291 



' SECTIOX OF GEOLOGY AND MINERALOGY 



29 September, 1913 



Section was called to order at 8 :15 p. m., Vice-President J. E. Wood- 

 man presiding, about 75 members and guests being present. 



There being no special business, the following paper was read by title : 



Alfred C. Hawkins, The Lockatong Formatiox of the Triassic of 



New Jersey axd Pexxsylvaxia. 



Then the lecture of the evening was presented as follows : 



A. Rothpletz, The Simplon Section of the Alps. 



Professor Dr. Rothpletz, of the University of Munich, after ha^■i^g been 

 introduced and warmly received, proceeded to speak upon his subject 

 without notes, illustrating with diagrams and such slides as could be fur- 

 nished at short notice by kindness of the authorities of the American 

 Museum of Natural History. At the conclusion of the lecture, Professor 

 James F. Kkmp of Columbia L^niversity voiced the sentiment of the Sec- 

 tion in an appropriate expression of gratitude, alluding incidentally to 

 the fact that Professor Eothpletz was at one time his preceptor. 



Summary of Paper 



Dr. Charles P. Berkey of Columbia University has kindly prepared 

 the following abstract of Professor Bothpletz's remarks for the Academy's 

 records : 



Professor Rothpletz explained the different views of the complicated 

 structure of the Alps in the vicinity of the tunnel. Sketches were drawn 

 to illustrate several successive steps or changes of view of the geologists 

 as to the structure of the schistose and gneissic members of the involved 

 series. These were, in part, attempts to explain the seemingly discordant 

 and unexpected data bearing on the distribution of these members as the 

 tunnel work and associated explorations progressed. Most of these sec- 

 tions were after Schmkit, who has worked out the structure in much de- 

 tail. The slight resemblance of the earlier to the later diagrams was most 

 striking. In all of them, the schists and gneisses were assumed to be 

 definite continuous formations representing dynamically metamorphosed 

 ancient strata, and the structural detail therefore was accredited to fold- 

 ing and related movements. 



After a personal study of the ground and special considerations of the 

 petrographic habit of the formations, Professor l^otlipletz concluded that 



