417 



Feet. 



Gray sandstone 50 



Coal 2,', 



Gray sandstone 420 



Coal 4| 



Total 527;? 



The Clallam Bay Field. This field lies in a synclinal trough between Pillar 

 Point at Pyscht and Slip Point on Clallam Bay on the Strait of Fuea and 

 extends inland about seven miles, but is interrupted on the east and south 

 by sharp faults and is truncated at the north by the Strait of Fuea. The coal 

 is in the Oligocene-Miocene formation. The formation here consists of six 

 hundred feet of coarse, thick-bedded, massive sandstone, interbedded with 

 an occasional bed of conglomerate. In it are also interbedded several workable 

 seams of coal. 



This field was discovered in the early 50's of last century. Of a specimen 

 of coal obtained at Slip Point then. Prof. J. S. Newberry gave the following 

 analysis: 2 



Fixed "carbon 46 . 40 per cent. 



Volatile matter .50 . 97 per cent. 



Ash 2 . 63 per cent. 



Total 100.00 per cent. 



Later, in about 1865. a mine was opened up 2i miles east of Slip Point, 

 known as the Thorndike Mine. At this place there were six leads of coal, 

 ranging in thickness from one to three feet, all having a dip of ten degrees. 

 The formation was sandstone and the coal seams were found to be from 

 twelve to one hundred feet apart. The coal was one of the best coals found 

 in the State of Washington. Mining at this time was continued till a fault 

 cut off the veins, or they pinched out. 



Coal is now being mined from other locations in the sea-front of the 

 same field. The work is being done by the Clallam Bay Coal Company. 

 Prospecting in 1904 discovered veins as follows: One seam exposed along the 

 coast was forty inches in thickness, another eighty feet stratigraphically 

 below this one was twelve inches in thickness, and another, a twenty-two 



^Pacific Railroad Report, Vol. IV, Part II, p. 67. 

 5084 — 27 



