It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
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!!
Originally posted by TheRedneck
Interesting... obviously not natural, but how could such a precise position be forced to have an earthquake? Maybe it's not really earthquakes, but something similar?
Flagged, and I'll be watching this thread. Seismology is not my strong suit, so you guys keep me informed.