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单词 allochthonous
释义

Definition of allochthonous in English:

allochthonous

adjective əˈlɒkθənəsəˈläkTHənəs
Geology
  • Denoting a deposit or formation that originated at a distance from its present position.

    〔地质〕搬移的,外来的,移积的。常与AUTOCHTHONOUS 相对

    Often contrasted with autochthonous
    Example sentencesExamples
    • The allochthonous units that overlie the eastern part of this terrane were probably emplaced when the Magnitogorsk volcanic arc collided with this margin in late Devonian times.
    • Although some skeletal remains are evidently allochthonous, other remains are probably parautochthonous.
    • The fossils of the westernmost exposures of the Hoko River Formation are allochthonous, preserved in reworked concretions within conglomerates that were deposited as part of a submarine fan system during late Eocene time.
    • However, this does not prove that the Moine rocks necessarily constitute an allochthonous terrane in the North American sense.
    • These rocks are also of biogeographic interest because unlike truly allochthonous terranes they are parautochthonous with respect to the craton.

Origin

Early 20th century: from allo- 'other' + Greek khthōn 'earth' + -ous.

Definition of allochthonous in US English:

allochthonous

adjectiveəˈläkTHənəs
Geology
  • Denoting sediment or rock that originated at a distance from its present position.

    〔地质〕搬移的,外来的,移积的。常与AUTOCHTHONOUS 相对

    Often contrasted with autochthonous
    Example sentencesExamples
    • These rocks are also of biogeographic interest because unlike truly allochthonous terranes they are parautochthonous with respect to the craton.
    • The allochthonous units that overlie the eastern part of this terrane were probably emplaced when the Magnitogorsk volcanic arc collided with this margin in late Devonian times.
    • However, this does not prove that the Moine rocks necessarily constitute an allochthonous terrane in the North American sense.
    • The fossils of the westernmost exposures of the Hoko River Formation are allochthonous, preserved in reworked concretions within conglomerates that were deposited as part of a submarine fan system during late Eocene time.
    • Although some skeletal remains are evidently allochthonous, other remains are probably parautochthonous.

Origin

Early 20th century: from allo- ‘other’ + Greek khthōn ‘earth’ + -ous.

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更新时间:2025/2/20 21:26:13