544 



PROCEEDINGS OF THE ROCHESTER MEETING 



is the best steaming coal discovered in Wyoming. This formation has never been 

 found east of Cumberland, and there are but few exposures west of that place 

 where coal has been discovered. When the territory has been thoroughly pros- 

 pected the greater part of the Coal Measures of Uinta county will be found to be 

 in the Frontier formation. On account of the superiority of the fuel, the Frontier 

 coal fields are being eagerly sought for and will be exhausted long before they pay 

 any attention to the Laramie lignites. The following are typical analyses: ' 



Laramie Coal. 



Water. 



Almy 



lied canyon. 

 Twin creek.. 

 Hams fork..... 



Frontier Coai 



Diamondville (selected). 

 Kemmerer (selected).... 



Diamondville 



Kemmerer 



Per cent. 

 7.38 



7.42 



8. -8 



15.64 



3.53 

 2.00 

 3.90 

 2.95 



Volatile 

 matter. 



Per cent. 

 34. n8 

 36.08 

 35.3a 

 49.30 



48.58 

 39.10 

 38.05 

 38.00 



Fixed 

 carbon. 



Per cent. 

 48.75 

 48.5U . 

 49.90 

 38.97 



51.36 

 55.85 

 53.55 

 54.00 



Ash. 



Per cent. 

 9.00 

 8.00 

 6.30 

 3.21 



1.53 

 3 05 

 4.50 

 4.05 



DEBRIS FANS OF THE ARID REGION IN THEIR RELATION TO WATER SUPPLY 



BY E. W. HILGARD 



Abstract published in Science. 



The Section then adjourned, to meet at 10 o'clock next morning. 



Session of the Cordilleran Section, Tuesday, December 31 



The Section met at 10 o'clock a m, in the rooms of the Geological 

 Department of the University of California, the Chairman, Mr H. W. 

 Turner, in the chair. 



The following papers were read and discussed : 



LAKE CHELAN, WASHINGTON 

 BY H. W. FAIRBANKS 



Abstract published in Science. 



GEOLOGICAL SECTION OF THE MIDDLE COAST RANGES OF CALIFORNIA 

 BY ANDREW C. LAWSON 



[Abstract J 



The paper is an attempt to summarize recently acquired information as to the 

 sequence of formations and their respective volumes of sediments in the Middle 

 Coast ranges of California. The results given for the thickness are approxima- 



