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Cataclysmic events
Crater Lake, Oregon partly fills a 4,000 feet (1,220 m) deep caldera that was formed in 5,677 (± 150) BC by the collapse of a volcano.
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Teaching resources on Cataclysmic Events
Vetted articles on Cataclysmic events
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Public Awareness of Climate Change
Most people, when surveyed about current issues, express at least a fair amount of concern about global climate change. They also believe that human activities are largely... More »
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Methane: Greenhouse Gas Enemy Number Two
Methane (CH4) is second only to carbon dioxide (CO2) in its contribution to the greenhouse effect and accounts for about 15% of anthropogenic warming. [1] Moreover, sudden... More »
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Ancient Earth: The First Three Billion Years
The Big Bang, the single point in space and time from which all matter and energy in the universe supposedly emanated, is thought to have occurred sometime around 13.7 Ga... More »
The Late Paleozoic: Responding to Catastrophe
Last Updated on 2012-08-22 at 14:54
Every major catastrophe seems to provide opportunities for new biological life forms. So it was with the Ordovician–Silurian Extinction. Up to that point, life had been... More »
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