Thursday, March 3, 2011
Early earth tectonics
This National Geographic video showing plate tectonics during the early earth covers a surprisingly large number of topics we have mentioned in this class - from the surprisingly early appearance of life before the end of the massive asteroid bombardment, to the generation of heat via radioactivity within the earth and the movement of the continents. Notice that they go much further back than Pangaea. Evidence for these early super continents is much weaker than the evidence for Pangaea.
'Here's how it might have happened...'
The UC Museum of Paleotology at Berkeley has some neat animated gifs of Plate tectonics, I like this one that ends with the present day. Check out India smashing into the rest of asia.