a ridge on the lower surface of a layer of sandstone corresponding to a groove on underlying mudstone.
| 单词 | θ4750 |
| 释义 | the world > the earth > structure of the earth > structural features > sedimentary formation > [noun] > stratum > position or direction of strata > load cast or sole-mark (3) groove cast1948 a ridge on the lower surface of a layer of sandstone corresponding to a groove on underlying mudstone. load cast1953 a rounded protrusion on the underside of a stratum (usually one of sandstone), owing to its having sunk before consolidation into the underlying… sole mark1961 = sole marking n. |
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