148

In No. 3 opening it is not certain that the whole of the seam has been cut. The 5 feet of coal exposed are shown in Figure 20.

The seam as a whole is very different from the Robertson seam, both in its greater freedom from impurities, and in the appearance and composition of the coal. The coal is greatly jointed by lenticularly intersecting surfaces, which cause it to break up in mining, but which will probably disappear to a large extent in the less disturbed parts of the seam. The coal is light in weight and burns freely with a smoky flame. It forms a light, flaky, white, or pinkish ash, and does not clinker until all but the last vestiges of carbon are burned. The coking qualities are excellent, judging from tests on one or two pounds, pulverized, and coked in a coal fire.

About three-fourths of a mile north 12 degrees west from No. 1 opening at Camp Wilson a dirty seam of coal and shale, about 7 feet thick, is exposed. This seam is about on the strike of the Wilson seam; and, although the two are vastly different in their constitution, the structural evidence, together with the well recognized variation of the coal seams on the island, point to the conclusion that this seam represents the Wilson seam. This interpretation can only be proved or disproved by careful prospecting, as the intervening country is virtually barren of exposures.

A section of the seam, for which the writer is indebted to Messrs. Milnor Roberts and Livingston Wernecke, is as follows:

Roof of seam is clay shale with coal lenticles.

Thickness. Feet inches

SN See eee Sen wee eaNe ¢ RES RS Be een, 4

CAs d J wie SR OE se 1

Gea shaker . S52 Ok SS eee ie ES OE 1 3

Camhas. S5588.5. 7 GS GTR Re! eRe AG SRS, AS 3 Ghalee. HGS. . SRR SR Sa ee ee 1

Coal. cn 5.585 atop SABRES Se OO ee Sas Pl

SHAIOS hens Le oe eke ea oe a er

a} Oo rat) —

BH bol IH bole ale