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

[Fabien Kuntz]

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