Soot and ash at levels tens of thousands times normal levels were found with the above." -- Reference Wikipedia.org "The geologic record of terminal Cretaceous environmental events indicates that iridium and other associated elements were not deposited instantaneously but during a time interval spanning some 10,000 to 100,000 years. The available geologic evidence favors a mantle rather than meteoritic origin for these elements. These results are in accord with the scenario of a series of intense eruptive volcanic events occurring during a relatively short geologic time interval and not with the scenario of a single large asteroid impact event." -- Reference Article Terminal Cretaceous Environmental Events Charles B. Officer and Charles L. Drake 2 1 Research professor in the Earth Sciences Department, Dartmouth College, Hanover, New Hampshire 03755. 2 Professor in the Earth Sciences Department, Dartmouth College, Hanover, New Hampshire. back to 132)
