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Fri Aug 30, 2019, 07:05 PM

Oxygen depletion in ancient oceans caused major mass extinction

Source: Florida State University via Phys.org

AUGUST 30, 2019

Oxygen depletion in ancient oceans caused major mass extinction

by Zachary Boehm, Florida State University

Late in the prehistoric Silurian Period, around 420 million years ago, a devastating mass extinction event wiped 23 percent of all marine animals from the face of the planet.

For years, scientists struggled to connect a mechanism to this mass extinction, one of the 10 most dramatic ever recorded in Earth's history. Now, researchers from Florida State University have confirmed that this event, referred to by scientists as the Lau/Kozlowskii extinction, was triggered by an all-too-familiar culprit: rapid and widespread depletion of oxygen in the global oceans.

Their study, published today in the journal Geology, resolves a longstanding paleoclimate mystery, and raises urgent concerns about the ruinous fate that could befall our modern oceans if well-established trends of deoxygenation persist and accelerate.

Unlike other famous mass extinctions that can be tidily linked to discrete, apocalyptic calamities like meteor impacts or volcanic eruptions, there was no known, spectacularly destructive event responsible for the Lau/Kozlowskii extinction.

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Read more: https://phys.org/news/2019-08-oxygen-depletion-ancient-oceans-major.html

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Related: Linking the progressive expansion of reducing conditions to a stepwise mass extinction event in the late Silurian oceans (Geology)

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Reply Oxygen depletion in ancient oceans caused major mass extinction (Original post)
Eugene Aug 2019 OP
NickB79 Sep 2019 #1

Response to Eugene (Original post)

Tue Sep 3, 2019, 10:48 PM

1. Canfield oceans.

Coming soon to a sea near you!

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