[meteorite-list] AD : The oldest rock on Earth, new specimens

From: Fabien Kuntz <wwmeteorites_at_meteoritecentral.com>
Date: Wed, 18 Aug 2010 21:03:51 +0000 (GMT)
Message-ID: <678197.98233.qm_at_web29620.mail.ird.yahoo.com>

Hello,

because absolutely all the specimens offered yesterday quickly found new homes,
I have updated the webpage, minutes ago... You will see this time the second
lithology of the 4.28Ga "faux-amphibolite" : The cummingtonite-rich.

As a paragneiss (metamorphosed volcanic sedimentary rock, with a layered
structure), the "faux-amphibolite" shows mineralogical heterogeneity, as
describe in the original thesis. The garnet-rich lithology can have some amount
of cummingtonite (beige band into the green matrix contains the garnet), but the
cummingtonite-rich lithology is totaly garnet free as you will see... But this
is the same rock, and the same age...

http://www.wwmeteorites.com/Nuvvuagittuq.html

Feel free to contact me

 Fabien Kuntz


      
Received on Wed 18 Aug 2010 05:03:51 PM PDT