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Acasta Gneiss Slave Lake Northwest Territories Canada
Acasta Gneiss NW Territories Canada Large 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 at this outcrop formed some 4.2 billion years ago; an age based on radiometric dating of zircon crystals.
This specimen is from this same age dated outcrop. Slightly weathered, considering the age it should be.
Size: 32mm H X 27mm W X 16mm D
Stands and cube not included.
Ships with tag (shown) and Certificate of Authenticity.FREE PRIORITY SHIPPING (2-3 days) IN THE USA!