1891.] ii\JO [Lyman. 



the coal liere is a local thickening of the small bed that occurs some fifteen 

 feet below Jerrold's Coal, The section at Mitchel's drifts is as follows, 

 from above downward : 



FT. IK. 



Slate, exposed about 1 6 



Coal, bituminous, less firm than Wood's Upper Coal, 



but of fair quality 3 1 



"Slate floor." 



4 7 



The same bed apparently was opened at the old drift on the Ketcham 

 Branch of the Left Fork of Lens Creek, near the mouth of the branch. The 

 coal is partly covered at the bottom ; but would seem to measure about 

 two feet in thickness. 



The Jerrold Coal is seen also at Mrs. Nuby's coal mine, a drift about six 

 feet long on the Left Fork of Lens Creek, 300 yards below her house, with 

 the following section from above downward : 



FT. IX. FT. IX. 



Shales, exposed about 4 



Coal, bituminous, of fair quality 1 -v 



Clay Oi ^ 2 lOa 



Coal, bituminous, of fair quality 1 10|^ J 



6 lOf 



Two inches above the clay seam, there is, at least in places, another 

 similar clay seam. 



The same bed was worked with eight old drifts close together just 

 across the creek, and had there the following section from above down- 

 ward : 



Sand rock, massive. ft. in. 



Slaty shales and shaly sand rock with small iron-ore 



nodules about 15 



Coal, bituminous, with two or three quarter-inch 

 seams of black clay at about nine inches below the 

 top ; apparently 3,, or more in one drift, in 



another, measured 2 10 



Slaty shales 10 



25 

 The same bed is worked with a drift a dozen yards long at Myer's Coal 

 Bank, close by the oil factory already mentioned, and has the following 

 section from above downward : 



FT. IX. FT. IN. 



Brownish gray sand rock, massive, about 13 



Slate 6 



Coal, bituminous, good 9 \ 



Black clay OJ I 2 8i 



Coal, bituminous, good 1 11 ^ 



15 2i 



