Thirty-five feet further along the tunnel a blind shaft has been sunk for 40 feet below the level of the tunnel. At the bottom of the blind shaft the ore is in a vein a few inches to 2 feet thick and G feet wide, occurring in coarse-grained diorite, underlying...
Bowen River Coalfields: Preliminary Report Relating To) - Page 22
by Robert Logan Jack - 1883 - 2 pages
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