An irregularity or break in the layering of river or shallow marine sediments caused by interruption of deposition by erosion; a period of such…
| 单词 | θ4869 |
| 释义 | the world > the earth > structure of the earth > structural features > discontinuity or unconformity > [noun] > non-sequence > in shallow sediments (1) ravinement1921 An irregularity or break in the layering of river or shallow marine sediments caused by interruption of deposition by erosion; a period of such… |
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