chemical fossils


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chemical fossils

[¦kem·i·kəl ′fäs·əlz]
(geology)
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The researchers used these "chemical fossils" to reconstruct the temperatures of the surface ocean.
The new research looked instead for "chemical fossils" - traces of organic molecules (compounds composed of mostly carbon and hydrogen) that can reveal the presence of specific types of organisms, even though all other parts of the organisms themselves are long gone.
A new analysis of ancient chemical fossils has rocked the cradle of early animal evolution, bumping back compelling evidence of animal life to at least 635 million years ago.
Chemical fossils dating back at least635 million years may be the earliest evidence of complex animal life.