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Re: Like a wool sweater in the washer...



Garrison Hilliard wrote:

> ... The Shrinking of Chicxulub...

Impact craters (especially buried ones) always seem to be over-estimated
at first. The Late Devonian Woodleigh structure in Western Australia was
initially estimated at 120km. More recent estimates suggest half this.

The Bedout High structure, off the coast of W.A., has been estimated at
anywhere between 180 and 250 km in diameter, which would make it one
hell of a P/Tr impact (if it IS an impact structure - and it seems
likely).

Is it possible to estimate an original crater size by looking at the
central uplift structure alone? This is usually more resiliant than the
rest of the crater, and more easily imaged when buried.

-- 
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Dann Pigdon                   Australian Dinosaurs:
GIS / Archaeologist         http://www.geocities.com/dannsdinosaurs
Melbourne, Australia        http://www.alphalink.com.au/~dannj/
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