Formation of a mineral in situ, at the same time as or later than the formation of the rock or deposit of which it is a part. Cf. authigenic, adj.
| 单词 | θ5031 |
| 释义 | the world > the earth > structure of the earth > structural features > [noun] > formation > by origin in place (4) authigenesis1888 Formation of a mineral in situ, at the same time as or later than the formation of the rock or deposit of which it is a part. Cf. authigenic, adj. allochthon1895 An allochthonous rock or mineral formation; esp. a part of a faulted formation that has been displaced by tectonic forces. Contrasted with autochthon… autochthon1895 Geology. An autochthonous rock formation (autochthonous, adj. 3), esp. a part of a faulted formation that has not been displaced by tectonic forces… Subcategories:— detached (1) |
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