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New way to read the record suggests abrupt extinction

Article Abstract:

Paleontologists Charles Marshall and Peter Ward claim that a meteor impact 65 million years ago did cause an abrupt mass extinction. They analyzed the fossil record with a new statistical method that uses a fossil's abundance in the record to predict the gap between the last known specimen and its extinction.

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A volcanic crisis for ancient life?

Article Abstract:

Researcher Paul Renne and his colleagues have used isotopic dating to show that the great mass extinction and a series of volcanic eruptions in Northern Siberia both occurred about 250 million years ago. Researchers are questioning the accuracy of the dating.

Geology, Stratigraphic, Stratigraphy, Permian period, Renne, Paul

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Geoscientists contemplate a fatal belch and a living ocean

Article Abstract:

Research topics at the 1995 Geological Society of America meeting included a theory that a surge of deep-sea carbon dioxide caused the extinctions at the end of the Permian period and a study of the effect of an ancient meteorite impact on the Atlantic Ocean.

Conferences, meetings and seminars, Natural history, Atlantic Ocean, Geological Society of America

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