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词汇 stromatolite
释义

Definition of stromatolite in English:

stromatolite

noun strə(ʊ)ˈmatəlʌɪtstrōˈmadəˌlīt
  • A calcareous mound built up of layers of lime-secreting cyanobacteria and trapped sediment, found in Precambrian rocks as the earliest known fossils, and still being formed in lagoons in Australasia.

    叠层石

    Example sentencesExamples
    • The oldest known fossils are the 3.5-billion-year-old stromatolites discovered in western Australia in 1980.
    • The formation has yielded numerous fossils of stromatolites in addition to microfossils.
    • They may be calcareous sponges, cyanobacteria, or stromatolites.
    • Fossilized cyanobacterial mounds are called stromatolites.
    • At first sight, the Shark Bay stromatolites look like rocks lying in an orderly fashion in the intertidal zone.

Origin

1930s: from modern Latin stroma, stromat- 'layer, covering' + -lite.

Definition of stromatolite in US English:

stromatolite

nounstrōˈmadəˌlīt
  • A calcareous mound built up of layers of lime-secreting cyanobacteria and trapped sediment, found in Precambrian rocks as the earliest known fossils, and still being formed in lagoons in Australasia.

    叠层石

    Example sentencesExamples
    • The formation has yielded numerous fossils of stromatolites in addition to microfossils.
    • Fossilized cyanobacterial mounds are called stromatolites.
    • The oldest known fossils are the 3.5-billion-year-old stromatolites discovered in western Australia in 1980.
    • They may be calcareous sponges, cyanobacteria, or stromatolites.
    • At first sight, the Shark Bay stromatolites look like rocks lying in an orderly fashion in the intertidal zone.

Origin

1930s: from modern Latin stroma, stromat- ‘layer, covering’ + -lite.

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