Hi Dave,
I think these are the most official definitions on impact rocks (by IUGS):
http://www.bgs.ac.uk/SCMR/docs/paper_12/scmr_paper_12_5.pdf
Impactite is the general term for rocks affected by impact metamorphism, including breccias, melt rocks, impact glasses, tektites ......
Best wishes
Dennis Harries
>Dear List;
>Is there a defined difference between impact glass and
>impactite? I see one picture of an impact glass that
>was hard to discern from impactite.
>So, lost as usual, is there a definition, or is it
>just a difference in the melt degree?
>Thank you,
>Dave Freeman
>
>
>
>
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