SAN FRANCISCO Scientists on Wednesday greeted with disbelief areport claiming that an asteroid that struck Earth 250 million yearsago broke up the super land mass known as Gondwanaland into Africa,Australia and other continents.
The radical theory said the impact helped cause Earth's worstmass extinction, cracked the planet's crust, caused flood-likeeruptions of lava and may have triggered the slow breakup ofGondwanaland over millions of years.
The report was presented at the American Geophysical Union'sfall meeting by Michael Rampino, New York University's appliedscience chairman, and by Verne Oberbeck, a geologist at NASA's AmesResearch Center in Mountain …
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