The earthquakes caused by rapid tectonics would have been rather disruptive, too. Geology just had an article on the Chicxulub impact causing large-scale collapse of the continental margin of eastern North America. If a single major asteroid impact can do that, the effects of continents hitting each other at about 75 km per hour need to be accounted for to make the model credible.
Dr. David Campbell
"Old Seashells"
Biology Department
Saint Mary's College of Maryland
18952 E. Fisher Road
St. Mary's City, MD 20686-3001 USA
dcampbell@osprey.smcm.edu, 301 862-0372 Fax: 301 862-0996
"Mollusks murmured 'Morning!'. And salmon chanted 'Evening!'."-Frank Muir, Oh My Word!
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