Which Event Was Not Involved in the Permian Mass Extinction

question 36

Multiple Choice

Which event was not involved in the Permian mass extinction?

• A) dramatic environmental change
• B) shifting wind patterns
• C) shifting ocean currents
• D) a decrease in the amount of shallow marine habitat
• E) a large meteor impact We know that 250 million years ago, at the time of the Permian mass extinction, all of Earth's continents came together to form one supercontinent called Pangaea Fig. 16.14a). The result was dramatic environmental change through the shifting of wind patterns and ocean currents and, most importantly, a decline in the amount of available shallow marine habitat. It was at the end of the Mesozoic era that a meteor crashed into Earth. This type of event has been proposed as a primary cause of the Cretaceous extinction.

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