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Deep-sea cores
Cores drilled from the sea bed that provide the most coherent record of climate changes on a worldwide scale. The cores contain shells of microscopic marine organisms (foraminifera) laid down on the ocean floor through the continuous process of sedimentation. Variations in the ratio of two oxygen isotopes in the calcium carbonate of these shells give a sensitive indicator of sea temperature at the time the organisms were alive.
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- Part of Speech: noun
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- Industry/Domain: Archaeology
- Category: Human evolution
- Company: ArchaeologyInfo.com
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