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Fw: extinction6
> > > Indeed not. But the impact site is composed of thick layers of
dolomite
> > > and... anhydrite (CaSO4 x 1/2 H2O).
> > That's hemihydrate, not anhydrite (CaSO4), Minerology was one of my
> branches
> > last term ;-)
>
> Isn't just this called anhydrite?
I guess not, 'cause anhydrite is greek for "without water", and my
Mineralogy-syllabus sais:
Gipsum: CaSO4.2H2O
Hemihydrate: CaSO4.1/2H2O
Anhydrite: CaSO4
of course this might be wrong nobody's perfect, but it seems logical