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Politics : Sharks in the Septic Tank -- Ignore unavailable to you. Want to Upgrade?

To: gao seng who wrote (16641)	6/14/2001 12:29:46 AM
From: average joe	Respond to of 82486

There are hundreds of different types of eruptions. Some come from only a few miles down and some from as deep as 100 miles down. If Tunguska was an ultra-mafic intrusion it would have came from an upper mantle melt at 80 - 100 miles. No evidence was found for an intrusion, however it could have come through a very small diameter hole of only a few inches. There was a gas bubble that erupted from a crater lake in Africa. The gas spilled over the sides and killed local villagers not by suffocation but by freezing. No one understands the pressure regime of gases at 100 miles depth, and what they act like when they hit surface. Every 100 million years or so the earth enters a cycle that generates these deep melts, we're in one right now. We can calculate a meteorite hit, what happens beneath our feet is another story. I think most of the anti-human activity rhetoric (such as Kyoto) is just self-loathing. We don't influence the environment is much as they say we do. We either buy and burn our way out of it or go back to the stone age.