Scottish. Mining. Usually in plural. A geological stratum containing minerals; rock encountered in mining. Obsolete.
| 单词 | θ4753 |
| 释义 | the world > the earth > structure of the earth > structural features > sedimentary formation > [noun] > stratum > stratum by constitution (57) metal1724 Scottish. Mining. Usually in plural. A geological stratum containing minerals; rock encountered in mining. Obsolete. Subcategories:— organic remains or fossils (14) — water-bearing (5) — porous (2) — decomposed rocks (1) — clay (2) — fuller's earth (6) — alluvial sediment (3) — layer of stones (4) — ash (1) — sand (3) — sandstone (4) — limestone (3) — girdle-bed (2) — hard stratum (3) — strata underlying a coal-seam (3) |
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