Hi,
The surface that Lake Murray material fell on was subsequently
buried under new layers and more new layers for millions of years, which
layers were then eventually eroded away for more millions of years,
returning it to the "surface" just in time to be found by Lincoln La Paz
in 1953 in a creek bed after 140,000,000 years. The 590 pound meteorite
was encased in a decay layer of decomposing iron shale six inches thick.
For all we know, it could have started out as big as Hoba! The fact that
it was an iron contributed a great deal to its survivability, of course.
The Chixculub surface under the Yucatan is still being buried deeper
and deeper since that nasty incident 65,000,000 years ago, although that
horizon can be found exposed near the surface elsewhere in the Caribbean
(like Haiti). The comparison with Lake Murray really doesn't apply to
any (im)possible Chixculub material.
Sterling K. Webb
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