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News Release 13-046

Before Dinosaurs' Era, Volcanic Eruptions Triggered Mass Extinction

Increase in atmospheric carbon dioxide, global warming, ocean acidification killed 76 percent of species on Earth

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Road passing through snow covered ancient rocks in Hartford Basin, Conn.

Back to the future? Ancient rocks in Hartford Basin, Conn., offer a look into geologic time.

Credit: Terrence Blackburn and Paul Olsen


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View of Palisade Sill near Alpine, N.J., from across a river.

Palisade Sill near Alpine, N.J., has geologic remnants of the end-Triassic extinction event.

Credit: Terrence Blackburn and Paul Olsen


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Mud stones and rocks in a basin near Newark, N.J.

In a rock basin near Newark, N.J., the extinction is preserved in sandstone and mudstone.

Credit: Terrence Blackburn and Paul Olsen


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Photo of rocks in a mountenous ancient extinction research site in Nova Scotia.

Red Head, Five Island Provincial Park, Nova Scotia: ancient extinction research site.

Credit: Terrence Blackburn and Paul Olsen


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Crystals in sheet-like basalt compared to the size of a quarter, near Rapidan, Va.

Coarse grain segregation in sheet-like basalt near Rapidan, Va.; elements have crystallized.

Credit: Terrence Blackburn and Paul Olsen


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cover of Science magazine

The researchers' findings are described in the March 22nd issue of the journal Science.

Credit: Copyright AAAS 2013


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