Silicon Investor (SI) -- The First Internet Community

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Politics : Stockman Scott's Political Debate Porch -- Ignore unavailable to you. Want to Upgrade?

To: TigerPaw who wrote (34503)	1/8/2004 4:57:04 PM
From: T L Comiskey	Read Replies (1) \| Respond to of 89467

Rock n Roll in Iowa (74 million BP) "The Manson event was undoubtedly a major catastrophe: the impact released about 2.2 x 1021 [2.2E21] Joules of energy (!) and launched about 1000 cubic kilometers of ejecta (15% into the troposphere, shrouding the earth). Manson ejecta is now clearly identified within the Pierre Shale (Crow Creek Member) of South Dakota and Nebraska. The effects of the shock wave produced by the impact have been tentatively scaled: 1) all combustible material within 200 km would have been ignited, 2) all standing vegetation would have been devastated to 600 km, 3) most terrestrial animals would have been killed by the shock to 1000 km (as far as Montana), and 4) large animals (e.g., dinosaurs) would have been knocked off their feet as far as 1300 km. Tsunami-like waves may have surged across the nearby Western Interior Seaway. Considering the extent of the devastation, the terrestrial biota apparently quickly recovered, undoubtedly replaced by migrants from elsewhere on the continent." dinosauria.com