Cambrian Explosion: Continents (Introduction)

by David Turell @, Saturday, November 01, 2014, 04:26 (1975 days ago) @ David Turell

Gonwondaland breaking up pushed the Cambrian? Georgraphy makes new complex species? Too much money funding grants. A gross non-sequitor:


"'At the boundary between the Precambrian and Cambrian periods, something big happened tectonically that triggered the spreading of shallow ocean water across the continents, which is clearly tied in time and space to the sudden explosion of multicellular, hard-shelled life on the planet," said Dalziel, a research professor at the Institute for Geophysics and a professor in the Department of Geological Sciences.

"Beyond the sea level rise itself, the ancient geologic and geographic changes probably led to a buildup of oxygen in the atmosphere and a change in ocean chemistry, allowing more complex life-forms to evolve, he said."

Note the modifying word 'probably'.


Read more at: http://phys.org/news/2014-10-massive-geographic-triggered-explosion-animal.html#jCp


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