In the majority of cases this clay belongs to the Glacial or Drift period, and in geological use ‘till’ has the specific sense ‘boulder clay’.
| 单词 | θ5946 |
| 释义 | the world > the earth > structure of the earth > constituent materials > clay > [noun] > boulder clay (3) till1842 In the majority of cases this clay belongs to the Glacial or Drift period, and in geological use ‘till’ has the specific sense ‘boulder clay’. boulder-clay1859 a clayey deposit belonging to the ice age, and containing boulders, etc. ground-moraine1863 subglacial till, boulder-clay; also attributive. |
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