RECORDS OF MEETINGS 417 



SECTION OF GEOLOGY AND MINERALOGY. 



May 2, 1910. 



Section met at 8 :30 p. m., Vice-President George F. Kunz presiding. 



The minutes of the last meeting of the Section were read and approved. 



Arrangements were made for a joint meeting with the geologists and 

 mineralogists of the neighboring region for this last meeting of the year. 

 The regular formal session of the Section was preceded by a field meeting. 

 A party of 38 assembled at the Eagle Hotel in Kingston, N. Y., the even- 

 ing of April 30. A conference was then held at which the general 

 geology of the Rondout region was presented by Dr. Rudolph Ruedemann 

 and Mr. Hartnagel of the New York State Survey, Professor Charles 

 Schuchert of Yale University, Dr. E. 0. Hovey of the American Museum 

 of Natural History, Professor D. W. Johnson of Harvard University and 

 Professor A. W. Grabau and Dr. Charles P. Berkey of Columbia Uni- 

 versity. 



The next day was spent in studying the Helderberg series at Kingston 

 and in making a cross section of the ridge at the old cement mines. Later 

 in the afternoon the party divided, one section going with Professor 

 Grabau to study the fauna of certain formations more fully, and the 

 other section following Dr. Berkey to High Falls to see the stream gorge 

 at that point and the excellent exposures of High Fall shale, Binnewater 

 sandstone and Shawangunk conglomerate, all of which are additional to 

 the formations seen in the morning at Kingston. 



Another conference was held in the evening which was participated in 

 by most of the visiting geologists. Several of the more obscure questions 

 were discussed at this session in which considerable difference of opinion 

 was developed. 



On the morning of May 2, the whole party went to Browns Station in 

 the margin of the Catskills to see the Ashokan Dam and other work being 

 done at the reservoir site by the New York City Board of Water Supply 

 as part of the Catskill water system. Mr. J. S, Langthorn, Division 

 Engineer, in charge of a division of this work, kindly took the party over 

 the most interesting portions of the field, among which were the 50-foot 

 trench being cut into the Sherburne sandstone, one of the large dikes and 

 the Ashokan Dam itself. 



At noon the party left Kingston for New York City, where, at 4 o'clock, 

 a short meeting was held in the rooms of the Department of Geology of 

 Columbia University with the following papers : 



