7-4 B GEOLOGICAL SURVEY OF CANADA. 



though it is to be presumed its horizon was reached. The larger 

 tunnels driven westward from Eobinson Creek have not been carried 

 far enough to strike the Hooper Creek seam. 

 Openings on On Eobinson Creek, joining Hooper Creek from the north-east, but 



Robmson Creek . ,/,,.? 



running nearly parallel with it where opposite the Hooper Creek 

 tunnel, a good deal of work has been done. In Hutchinson's tunnel, 

 situated about eleven chains north-eastward from the Hooper Creek 

 tunnel, and 430 feet in length, no coal appears to have been obtained, 

 with the exception of a three inch seam near its mouth. In three 

 small tunnels made by Mr. Eobinson, at distances of three, nine and 

 eleven chains above Hutchinson's, coal was found. In the first, accord- 

 ing to a report prepared by Mr. Landale for the company, in 

 November, 1869, the seam was three feet thick ; in the second and 

 third, seven feet, but 'soft,' an expression which seems from the 

 appearance of coal still to be seen on the dumps, to mean that though 

 good anthracite it is completely crushed, probably by movement of 

 the strata subsequent to its formation. About thirteen chains below 

 Hutchinson's tunnel, also on the right bank of Eobinson Creek, is 

 Wilkes' Tunnel, said to be 450 feet long. It appears to have been 

 driven sufficiently far to intersect the coal subsequently to be men- 

 tioned as occurring between Hooper and Eobinson Creeks, and at its 

 end a black shale with Unio Hubbardi, like that seen in the Hooper 

 Creek tunnel, was found by Mr. Eichardson. 

 Shafts between On the hill between Hooper Creek tunnel and Hutchinson's, three 

 Robinson small shafts have been sunk. In one of these e:ood coal occurs, related, 



Creek= 



as shown in the following section by Mr. Eichardson, to the neighbour- 

 ing beds. — 



FEET IN. 



Coal, good anthracite 6 



Black argillaceous shale 4 6 



Coal, good anthracite, called " the three-feet seam" 2 5 



Black argillaceous shale, with nodules of clay ironstone 11 



Grey trap, or it may be altered sandstone 8 



26 5 



The first-mentioned bed is on the south-west side, the strata being 

 vertical. In one of the other shafts earthy impure coal was found ; 

 in the third little or no anthracite was obtained. 

 Supposed It has been supposed that there are in the vicinity of the Cowgitz 



existence of /i i 



three seams. Mine two or three distinct seams of anthracite, that on Hooper Creek 

 being the lowest, while those opened on to the eastward and northward 

 are higher in the series. It appears to me probable, however, that 

 with the possible exception of small irregular seams, there is but a 

 single coal-bearing horizon, and that that lies immediately above the 



