Rock layers marking the transition from the Devonian to the Carboniferous geological periods (IMAGE)
Caption
On the left in the Martinrive section (HBS: Hangenberg Balck Shale, a sedimentary deposit that recorded strongly dysoxic marine waters), on the right the Chansin section (the arrows indicate the sedimentary strata that recorded the sudden decrease in sea levels at the end of the Devonian).
Credit
Denayer et al., 2020, Palaeodiversity & Palaeoenvironment
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