Sediments (IMAGE)

Stanford's School of Earth, Energy & Environmental Sciences

Sediments

Caption

Laminated black shales and cherts exposed on the Peel River, Yukon, Canada, that were deposited during the late Ordovician and earliest Silurian. These sediments show no evidence of organisms living on the seafloor due to anoxic conditions at the seabed. Researchers estimated the global extent of low-oxygen conditions during this time period using new trace metal isotope data and uncertainty modeling.

Credit

Erik Sperling

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Photo credit to Erik Sperling

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