1893. ] NEW YORK ACADEMY OF. SCIENCES. 221 
May 22, 1893. 
Prof. R. P. Wuirrirrp iv the chair, and thirty persons present 
SECTION OF GEOLOGY AND MINERALOGY. 
The following papers were read : 
‘“The Granite at Mounts Adam and Eve, Orange County, 
N. Y., and its Contact Phenomena,’’ illustrated by maps, pho- 
tographs and specimens. By James F. Kemp and Arthur 
Ho tick. 
It described the general geology of the region, reviewed the 
literature, which, however, is meagre, nothing having been 
written since Maruer’s Report of the New York State Survey in 
1844, and commented on the results obtained in New Jersey. 
The petrography of the granite, and of the blue and white 
limestones was described, as were the interesting minerals of 
the contact zones along the borders of the granite and the white 
limestone. The conclusions reached, were that the white 
limestone had suffered extensive contact metamorphism from 
the granite intrusions ; but as to whether the white limestone is 
altered blue or not the evidence isless conclusive. The authors 
believed, however, from the field relations, the transition forms 
and the commingling of the two, that the white was metamor- 
phosed blue. 
Some notes on Helderberg fossils found near Stone Bridge 
concluded the paper. 
The contribution was discused by Professor A. H. Cuersrer, 
especially as regards the mineralogy of the contact zones, and 
the close parallel that they offer to those of the New Jersey 
limestones. 
Dr. N. L. Brrrton spoke of his work in New Jersey and the 
apparent interstratification of the white limestone with the 
gneisses, and the opposing dips of the blue and white that led 
him to conclude that they were of different ages. 
Remarks were also made by Prof. R. P. Wurrrierp, 
The paper will be published in the Annats. 
