[meteorite-list] impactite vs. impact glass
From: Robert Verish <bolidechaser_at_meteoritecentral.com>
Date: Thu Apr 22 10:23:49 2004 Message-ID: <20030321194419.41816.qmail_at_web80401.mail.yahoo.com> http://www.bgs.ac.uk/SCMR/docs/paper_12/scmr_paper_12_5.pdf Hello Dave and Dennis and all, This USGS paper raises more questions. Under the term "Impact Melt Breccia" it recommends that it's use be "discarded"! It doesn't suggest a replacement term. It's not obvious to me what the new term should be, so could someone tell me, what is the "preferred" term? Since the author is Stoffler, I'm assuming these terms are applicable for use in describing meteorites. But this may not be the case. I may be wrong in my assumption, and this list of terms may be only applicable for metamorphic processes involving Terran, Lunar, and Martian impact events and their resultant impactites. Is there a separate list of "approved" terms for asteroidal impact events and meteorites? More questions still, BOb V. ------------------------------- [meteorite-list] impactite vs. impact glass Dennis Harries dennis_harries_at_hotmail.com Thu, 20 Mar 2003 08:42:37 +0000 <html><div style='background-color:'><DIV> <P>Hi Dave,</P> <P>I think these are the most official definitions on impact rocks (by IUGS):</P> <P><A href="http://www.bgs.ac.uk/SCMR/docs/paper_12/scmr_paper_12_5.pdf">http://www.bgs.ac.uk/SCMR/docs/paper_12/scmr_paper_12_5.pdf</A></P> <P>Impactite is the general term for rocks affected by impact metamorphism, including breccias, melt rocks, impact glasses, tektites ......</P> <P>Best wishes</P> <P>Dennis Harries</P> <P><BR> __________________________________________________ Do you Yahoo!? Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop! http://platinum.yahoo.com Received on Fri 21 Mar 2003 02:44:19 PM PST |
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