it is their right, it is their duty, to throw off such Government, and to provide new Guards for their future security
Posted 23 December 2012 - 06:55 PM
Mount Mazama began its climactic eruption about 7,700 years ago, blowing out about 50 km3 (12 mi3) of magma as pyroclastic materials (mostly rhyodacite pumice and fine ash) in at most a few days. The volcanic ash covered parts of the northwestern states to as far as central Canada. Rare particles of Mazama ash have even been found in ancient ice from Greenland. The airfall pumice and ash covered a total surface area of more than 2,600,000 km2 (1,000,000 mi2) at least 1 mm (fraction of an inch) thick, and no less than 13,000 km2 (5,000 mi2) more than 15 cm (6 in) thick. A volume of 42-54 km3 (10-13 mi3) of the mountaintop had disappeared.
That would have been a heckuva thing to be hanging around for