Bulletin (Geological Survey of Western Australia) Volume 4-7 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1900 edition. Excerpt: ...North of the main workings are probably on a lower horizon than the Collie Proprietary seam. No. 13 Hand Bore penetrated two seams, the first about seven feet thick at a depth of 15 feet, and the 9 feet 6 inches seam at a vertical depth of 26 feet below the surface. About 15 chains East of this is No. 14 bore, which was carried down 84 feet 2 inches, when a seam of coal was met with; its thickness was never tested, owing to the abandonment of the bore. The seams in No. 3 Hand Bore may probably be those shown in No. 4 Diamond Drill Bore at 609 and 616 feet respectively; these being the only coals at all comparable with them. The centre of the coal basin has been"j explored by means of Diamond Drill Bore No. 3, down to a depth of 270 feet, and several seams of coal met with. The section of this bore is as follows: --No. 3.--Diamond Drill Bore. 592 feet above Sea lievel. The Northern outcrop of the field, just to the North of Coal Mining Lease 171, was explored by No. 1 Diamond Drill Bore, and the granite beneath the sedimentary beds met with at a depth of 417 feet. No coals were met with. The strata are obviously on a lower horizon than those with which the coals are associated at Wallsend. Diamond Drill Bore No. 5 was sunk to a depth of 96 feet, some little distance outside the Western edge of the Coal Measures. The bore passed through 91 feet of superficial deposits, and penetrated 5 feet into an olivine diorite, when operations ceased. The Collie Coalfield being situated in a comparatively small basin at some considerable elevation above the Coastal Plain, it is by no means improbable that similar areas exist along the coast, where the physical conditions are favourable to the deposition of coal seams. That such a condition is highly...