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词汇 speleothem
释义

Definition of speleothem in English:

speleothem

noun ˈspiːlɪə(ʊ)θɛmˈspēlēəˌTHem
Geology
  • A structure formed in a cave by the deposition of minerals from water, e.g. a stalactite or stalagmite.

    〔地质〕洞穴堆积物(例如钟乳石、石筍)

    Example sentencesExamples
    • The agencies enforce the 1988 Federal Cave Resources Protection Act, which does little to protect caves other than sending those caught removing speleothems to jail for up to a year.
    • Stalactites, stalagmites, and other speleothems - or cave formations - grow as water travels through rocks, dissolves minerals, and then seeps into caves and redeposits those substances.
    • The most common type of speleothems studied for palaeoclimate are cylindrical stalagmites.
    • I am also aware that speleothems are rarely pure calcium carbonate, but often contain large amounts of impurities such as soil or clay particles or surface organic material.
    • Water chemical data are important for palaeohydrological interpretations, but in this case we restrict the discussion to available water data from close to the studied speleothems.

Origin

1950s: from Greek spēlaion 'cave' + thema 'deposit'.

Definition of speleothem in US English:

speleothem

nounˈspēlēəˌTHem
Geology
  • A structure formed in a cave by the deposition of minerals from water, e.g. a stalactite or stalagmite.

    〔地质〕洞穴堆积物(例如钟乳石、石筍)

    Example sentencesExamples
    • The agencies enforce the 1988 Federal Cave Resources Protection Act, which does little to protect caves other than sending those caught removing speleothems to jail for up to a year.
    • Water chemical data are important for palaeohydrological interpretations, but in this case we restrict the discussion to available water data from close to the studied speleothems.
    • Stalactites, stalagmites, and other speleothems - or cave formations - grow as water travels through rocks, dissolves minerals, and then seeps into caves and redeposits those substances.
    • I am also aware that speleothems are rarely pure calcium carbonate, but often contain large amounts of impurities such as soil or clay particles or surface organic material.
    • The most common type of speleothems studied for palaeoclimate are cylindrical stalagmites.

Origin

1950s: from Greek spēlaion ‘cave’ + thema ‘deposit’.

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