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Acasta Tonalite Gneiss
Acasta Tonalite Gneiss NW Territories Canada- New!
Nestled in the remote Northwest Territories of northern Canada, in the Slave Lake province, is the oldest and most unique known zircon-bearing evolved crust on Earth, acasta gneiss. The Acasta gneiss rock outcrop complex was formed during the earliest time of our planet's history, the Hadean Eon. The name is taken from the local Acasta River, east of Great Slave Lake some good distance north of Yellowknife. The rock exposed in the outcrop formed some 4.2 billion years ago; an age based on radiometric dating of zircon crystals.
Specimen is shipped in a clear see-thru mineral box with information, tag, and certificate of authenticity. It is not glued but adheres to the case with removable mineral tack.
Size: 54mm H X 31mm W X 20mm D, 27 grams
This is the exact specimen for sale.
Great rare specimen!
Stands and cube not included.