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An enormous rifting occurred, causing massive floods of basaltic lavas and the release of large amounts of gas. This is thought to have been the cause of which mass extinction?
the end Triassic mass extinction
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Original conversation
User: An enormous rifting occurred, causing massive floods of basaltic lavas and the release of large amounts of gas. This is thought to have been the cause of which mass extinction?

Weegy: the end Triassic mass extinction
toxictoast96|Points 1853|

User: The mass extinction that was most likely caused by the formation and retreat of glaciers was the _____ extinction.

User: The Cretaceous-Tertiary extinction, the most famous of the Big Five, has been attributed to what major event(s) that triggered the extinction of the dinosaurs?

Weegy: Almost all the large vertebrates on Earth, on land, at sea, and in the air (all dinosaurs, plesiosaurs, mosasaurs, and pterosaurs) suddenly became extinct about 65 Ma, at the end of the Cretaceous Period. [ [ At the same time, most plankton and many tropical invertebrates, especially reef-dwellers, became extinct, and many land plants were severely affected. This extinction event marks a major boundary in Earth's history, the K-T or Cretaceous-Tertiary boundary, and the end of the Mesozoic Era. The K-T extinctions were worldwide, affecting all the major continents and oceans. There are still arguments about just how short the event was. It was certainly sudden in geological terms and may have been catastrophic by anyone's standards. ] ]
Expert answered|itolduso|Points 6174|

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Asked 5/13/2010 3:56:13 PM
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