The scientists analysed circa 550 million-year-old chemical sedimentary rocks, known as cherts, which form from seawater and the remains of silica-secreting organisms. (IMAGE)

University of Göttingen

The scientists analysed circa 550 million-year-old chemical sedimentary rocks, known as cherts, which form from seawater and the remains of silica-secreting organisms.

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The scientists analysed circa 550 million-year-old chemical sedimentary rocks, known as cherts, which form from seawater and the remains of silica-secreting organisms.

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Michael Tatzel

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