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IV.—On Explosive Slickensides
Published online by Cambridge University Press: 01 May 2009
Extract
During a recent examination of the lead-mines of Derbyshire, I was interested in some accounts of explosions which had taken place, which were not due either to any material used by the workmen or to fire-damp. Though at first inclined to believe that the accounts were exaggerated, I soon found that not only was the evidence of such explosions having constituted a real danger to the men overwhelming, but that accidents are still liable to occur from this cause. The explosions are connected with the structure known as slickenside in the veins.
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References
page 400 note 1 Wherever Dr. Wright has mentioned the zone of Harp, serpentinum, it must prohably be taken to indicate the zone of Am. falcifer.
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page 402 note 1 Slappits, fragments of the minerals burst out of the vein.
page 402 note 2 Stemples, joists laid across fissures, when the minerals are cut out, by way of making a floor, on which rubbish is deposited, to save the expense of raising it to the surface.
page 402 note 3 Forefield, that part of the vein under workmanship.
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page 405 note 2 In a letter dated 23rd November, 1886.
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