Researchers at Ohio State University have discovered that volcanoes played a pivotal role in a deadly ice age that occurred nearly half a billion years ago. This photograph shows volcanic ash beds -- formed around 455 million years ago -- layered in the rock of the Nashville Dome area in central Tennessee. (Credit: Photo by Matthew Saltzman, courtesy of Ohio State University)From Science Daily:
Science Daily (Oct. 26, 2009) — Researchers here have discovered the pivotal role that volcanoes played in a deadly ice age 450 million years ago.
Perhaps ironically, these volcanoes first caused global warming -- by releasing massive amounts of carbon dioxide into the atmosphere.
When they stopped erupting, Earth's climate was thrown off balance, and the ice age began.
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