THIRD REPORT OF THE DIRECTOR I906 5 1 



Section V 

 Caves of the Onisketh^u valley 



Two caves are'known to exist on the north side of this creek, one 

 in the ManHus where that formation is brought to the surface in an 

 anticHnal fold i>^ miles southwest of South Bethlehem, the other at 

 Clarksville. The former was not visited. 



The Clarksville cave in its lower course is nearly filled with 

 gravel and for a long distance is inaccessible. A short section may 

 be entered near the road running east and west through the village, 

 and a short distance from the old hotel. It is called the " Little 

 cave." A longer section, the " Big cave," is entered at the top of the 

 hill north of the shorter part. The cave presents usually a smooth 

 rounded arch in the harder beds, though in the thinner beds the 

 floor is littered with fragments and presents much the appearance 

 of a Manlius cavern. A stream flows through it at all seasons and 

 empties into the Oniskethau creek south of the village. It is ponded 

 in the larger section some rods from the entrance and it would be 

 necessary to build a boat in the cave to cross the water. It is quite 

 possible that this stream enters the rock opposite the church near 

 Thompsons Lake, but this can not be determined without further 

 exploration. The cavern is in the Onondaga limestone. 



INTERNATIONAL COMMITTEE ON GEOLOGICAL NOMENCLATURE 



This is a committee organized by the joint action of the Geological 

 Survey of Canada and the United States Geological Survey for 

 the purpose of attaining a uniformity of nomenclature for the rock 

 formations traversed by the international boundary and spreading 

 thence north and south. During the past season the New York- 

 Canada boundary was under special consideration by a subcommittee 

 represented by Drs F. D. Adams and A. P. Coleman of Canada, Pro- 

 fessors J. F. Kemp and C. H. Van Hise for the Lhiited States Geolog- 

 ical Survey and Prof. II. P. Gushing for the New York Survey. This 

 field conference involved the review of areas of crystalline rocks 

 within the Adirondack region and north of the New York line. The 

 results are believed to be entirely satisfactory to all interests con- 

 cerned. 



INTERNATIONAL CONGRESS OF GEOLOGISTS 



The convention of this international body representing the 

 geologists of the world was held in September 1906, in the City 

 of Mexico. As it was impracticable, because of more pressing 

 engagements, for the State Geologist to be present this institution 



