THE BERING RIVER COAL FIELD 



425 



View taken fsom tee McDonald Camp on the East Shoee of Bering Lake, looking 

 to the left of Katalla Valley on the opposite side of the lake. 



of the formation are best exposed, more than a dozen seams of coal 

 may be seen, but several of these are thin and unimportant. In places, 

 the best coal beds have thicknesses of more than 25 feet of good coal; 

 at many places beds exceeding ten feet may be seen. Owing to the 

 complexity of structure and the small amount of development work it 

 is impossible to correlate the coal beds in one part of the field with 

 those of other parts, even when the outcrops are not widely separated. 

 The thicknesses of the beds often vary greatly within short distances 

 along both the strike and the dip. In some places the evidence sug- 

 gests that the irregularities in thickness are due to movements, the coal 

 having been squeezed into great pockets of irregular shape. More- 



View taken from the Mouth of Charlotte Lake, looking toward a lobe of Martin 



River Glacier. 



