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THE GEOLOGICAL SOCIETY OF AMERICA. 



The Fourth Annual and Summer Meeting of the Geological 

 Society of America was held last week in Rochester, N. Y., and in 

 connection with the Forty first Meeting of the American A-sociation 

 for the Advancement of Science. 



There were upwards of fifty fellows present. Monday and Tuesday, 

 August 15th and i6th, were the days set apart for the reading and 

 discussion of [jajjers. The warmest and most animated discussion took 

 place on the second day — when two papers on the " Ice Age," by 

 Messrs. Warren Upham and G. Frederick Wright, well known glacialists, 

 were taken up. Mr. Upham's paper was a detailed description of the 

 origin, mode of formation and '"conditions of accumulation of Drum- 

 lins," illustrated with numerous diagrams and figures of various forms 

 met with in different districts. Drumlins were made up of eti-glaaal 

 drift material accumulated rapidly and during the departure of the ice 

 close to the border. The author referred to the irregularity of the 

 drumlins as puzzling. The relation of drumlins to the terminal moraine 

 was also discussed, as also the different shapes drumlins assume owing 

 to the conditions under wuich they are accumulated. 



Prof. G. F. Wright's paper then followed on the subject: "'The 

 extra-morainic drift of the Susquehanna Valley." This so-called 

 " fringe " of the long, great terminal moraine was of much importance 

 and significance. Its remote antiquity was discussed. A detailed 

 account of careful observations made by the author in the Valley of the 

 Susquehanna was then given. In the discussion which followed both 

 papers Messrs. Gilbert, McGee, Salisbury, Upham, and Wright topk part. 



Prof. C. H. Hitchcock's " Studies of the Connecticut Valley 

 Glacier," also proved of considerable interest. 



Prof. James Ha'l, the veteran palaeontologist of North America, 

 who was the first to welcome us on arriving at Rochester, received a very 

 Iiear:y reception on presenting his paper " On the Oneonta Sandstone; 

 its relations to the Portage, Cheming and Catskill Groups " This was 

 a remarkable paper in which tiie correlation of strata by lithological or 

 petrographical characters as well as of faunas by palieontological char- 

 acters was rendered difficult by the variety and number of formations 



