Proponents argue that in certain geologic areas, MTR and similar forms of surface mining allow the only access to thin seams of coal that traditional underground mining would not be able to mine.
12.
On the shore of Moray Firth at Rathie a small patch of Kimeridge shale occurs, and beneath the cliffs of Shandwick there is a little Lower Oolite with a thin seam of coal.
13.
The northernmost extent of the South Yorkshire Coalfield is marked by the change of the fields richest and highest grade coal seam, the Barnsley Seam or Bed, to a thin seam of inferior coal.
14.
Harold Heslop, author of the novel " The Earth Beneath " ( 1946 ) was another coal miner, but from the north-east of England, as was Sid Chaplin, who wrote " The Thin Seam " ( 1949 ).
15.
The mine was known as a " pocito, " a small privately owned operation that mines for thin seams of coal with outmoded methods and generally violates Mexican safety standards, the San Antonio Express-News reported in Friday editions.
16.
The environmentalists say that the permitting process is not a minor matter but one that has already erased more than 1, 000 miles of streams in Appalachia because of extensive mountaintop mining, the practice of shearing off the tops of mountains to extract coal from thin seams.
17.
This system had three primary advantages; firstly, it was ideal for working thin seams; secondly, since it did not require pillars they could remove almost all of the coal; and thirdly, they could remove the coal in a single operation; and when undermined, the pressure of the strata above brought the roof down in large lumps.
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