So what is your take on it, if you have ten years in the field? Is it man made? Are they trying to stimulate Yosemite? Building a huge underground
base?
[edit on 3-5-2008 by jasonjnelson]
A period of explosive volcanism rocked the western United States approximately 25-40 million years ago (Armstrong and Ward, 1991), producing hot ash flows and volcanic deposits that covered parts of the region. This event, termed the Mid-Tertiary Ignimbrite Flare-up, erupted a truly voluminous amount of igneous material, perhaps over 120,000 cubic miles of rock (Johnson, 1991)!! This volume is almost unimaginable so to get a better handle on comprehending the amount of ash erupted erupted in this event, consider that Colorado has a land area of about 104,000 square miles (U.S. Census Bureau, 2002). If the ash from this explosive volcanic event was deposited across Colorado only, a blanket of rock over a mile thick would cover the state!!