THE BERING RIVER COAL FIELD 



421 



flows from beneath the margin of 

 the glacier; Stillwater and Shep- 

 herd Creeks drain Lakes Kushtaka 

 and Charlotte, respectively. Both 

 of these lakes are of glacial origin. 



The precipitation of the region 

 is probably in excess of 130 inches 

 annually. The snow fall is very 

 heavy. Above an elevation of 1,500 

 feet considerable snow is present 

 even during the summer months. 



The climate is not severe, the 

 coldest weather recorded being 2° 

 F. above zero. The average winter 

 temperature is about freezing 



A Sill of Igneous Rock in contact 

 with a Seam of Coal. Some of the coal 

 has been converted into coke as a result 

 of the intrusion. South end of Carbon 



Mountain. 



Entrance to a Tunnel on the Purdy 

 Claim West of Shepherd Creek. 



point; the average summer tem- 

 perature between 50° and 55° F. 



The slopes are usually tim- 

 bered with spruce and hemlock to 

 an elevation of more than 1,000 

 feet. 



The Geology of the Region 

 The chief rocks of the coal field 

 consist of indurated sediments of 

 Tertiary age and unconsolidated 

 stream deposits, abandoned beaches 

 and morainal material of Quater- 

 nary age. Associated with the Ter- 



