LARAMIE, Wyo., April 14 -- The University of Wyoming issued the following news release:

Mark Clementz, a professor in the University of Wyoming Department of Geology and Geophysics, and colleagues have produced a compelling study that shows that an increase in volcanic activity in the Andes in the Late Miocene Epoch likely resulted in a cooling of the Earth between 5.4 million and 7 million years ago.

The volcanic activity produced a biological boom in the Southern Ocean, which led to a drawdown of atmospheric carbon dioxide that resulted in global cooling, Clementz and co-authors concluded. Their findings are in a new article, titled "Andean volcanism, ocean fertilization, marine ecosystem turnover, and global cooling in the Late Miocene...