[meteorite-list] AVIRIS image of Meteor Crater
From: Paul Dudley <pdudley_at_meteoritecentral.com>
Date: Thu Apr 22 09:46:22 2004
>No evidence of shock metamorphism anywhere at Upheaval. I just attended a
>week-long Geological Society of America Field Forum there. We discussed the
>possibilities of it being a crater. The most compelling evidence is the
>structural element itself. However, there has not been to date, a single
>shocked quartz grain found. Nor any impact breccias. You decide. If the
The structure itself works for the old salt dome theory as well. Oh, for
some shocked quartz, shattercones, or melt breccia.
About a year ago I was given a sample of a sandstone from the structure that
was said to show shock features. Upon examination, I determined that it was
just cleavage in the calcite cement. I dissolved it in acid and checked out
the resulting sand grains. Nothing.
Received on Mon 07 May 2001 10:19:31 PM PDT