Uploaded on Aug 26, 2010
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The history of the earth is immense, and diverse – and its easy to get confused and mangle history, — to mix things that never belonged together in the real world.
What was natural in the distant past might not be a good fit alongside man’s creations.
Human beings and the climate of the ancient world, could find themselves on a collision course.
Richard Alley, Bjerknes Lecture, American Geophysical Union,
snowball earth – dropstones and carbon cap
A major drop in seawater 87Sr/86Sr during the Middle Ordovician (Darriwilian): Links to volcanism and climate?
University of York, Greenhouse/Extinction connection
US Geological Survey, Volcanic gases