122

length of the ‘tunnel’ the measures are involved in a sharp syn-
cline with a corresponding broader anticline. The rocks and
seams are also broken by one or two small transverse faults.

The A seam is six feet thick and consists of a somewhat
crushed coal, which has the appearance of being graphitic.

Slaty shale roof

Slaty shale roof
/F¥t.en. coal

/ ft. coal

617. slaty Shale SSS
(rot sampled 1) =

8in. coa/ /ft.2in. slaty shale
(not sampled)

6 ih, bony coa/

eft. slaty shale (not sampled)

(not sampled)

26t. Fin. coa/

/ft.24 in. coal

Slaty shale floor Slaty shale floor

Geological Survey, Canada.

Figure 11. Sections B and C seams exposed in tunnel of British Pacific Coal
Company, section 4, township 11, Graham island, B.C.

The B seam is 5 ft. 63 in. thick, and the C seam is 5 feet thick.
The coal from these seams is not greatly crushed.”

Detailed sections of these seams are given in Figure 11.

In appearance the coal is of two principal kinds: a dull,
somewhat lustreless variety, which is crushed; and a brilliantly
black, hard, anthracitic looking material. The two varieties form
alternating layers. Some of the bands of brilliant coal which
are up to 3 inches thick possess a rude parting in sensibly parallel