530 PROCEEDINGS OF THE ROCHESTER MEETING 



AGE OF LAKE BAIKAL 

 BY G. FREDERICK WRIGHT 



[Abstract.] 



The region below lake Baikal is covered with strata of Tertiary (and possibly 

 Triassic) age, containing coal. These beds are derived from the sediments which 

 were carried by now existing streams into the basin from the surrounding moun- 

 tains before the present lake came into existence. At the estimated rate of ero- 

 sion, the entire lake would be filled in 400,000 years, whereas it is not a quarter 

 full, and probably not one-tenth full. The age of lake Baikal is perhaps 100,000 

 years or less. That this region was formerly connected with the sea is shown by 

 the species of seal found in lake Baikal, which are also found in the Caspian sea. 

 Other evidence of recent submergence followed by reelevation exists. A period of 

 increased precipitation caused the freshening of all the waters of the inland lakes 

 of this region. 



Remarks were made on the papers by W. B. Scott. 



Announcements were made by the Secretary regarding the dinner to 

 occur in the evening, the reception tendered to the Society by the presi- 

 dent of the University on Thursday evening, the local geological excur- 

 sions suggested, if time allowed, and the new titles of papers added to 

 the program. 



The following paper was read by the senior author : 



SOME ANTICLINAL FOLDS 

 BY T. C. HOPKINS AND MARTIN SMALLWOOD 



[Abstract.] 



A number of unique folds occur in several small and rather deep ravines in the 

 vicinity of Meadville, Pennsylvania. They are of limited extent, both vertical and 

 linear, and so far as known occur only in the bottom of the ravines. The relation 

 of the folds to certain land-slip terraces suggests a cause for these folds. 



Remarks were made by I. C. White, A. P. Brigham, I. C. Russell, J. J. 

 Stevenson, and Mr C. J. Sarle, a visitor. 



The following two papers were read and discussed as one : 



DISTRIBUTION OF THE INTERNAL HEAT OF THE EARTH 

 BY T. C CHAMBERLIN 



[Abstract] 



Assuming that Barus's law relative to the melting point of diabase under varying 

 pressure is valid when extended to all the pressures and temperatures of the 

 earth's interior, and assuming also that diabase is in this respect representative of 



