Acasta tonalite gneiss fragment rock – the oldest known rock on earth!

Description Size (picture scale cube=1cm) shows average size SIMILAR TO SEEN: The image shows an example of the single specimen you will receive. This will be picked from our stock box graded and with a size within the minimum and maximum size range indicated. It will not be the exact specimen in the photo, the colours, shape, size and style may vary as with any natural item. All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity Type: Acasta Gneiss (Oldest known rock on earth) Age: 3.6 – 4 billion years old Location Found: Northwest Territories, Canada The Acasta Gneiss is a tonalite gneiss in the Slave craton in the Northwest Territories, Canada. The rock body is exposed on an island about 300 kilometres north of Yellowknife. The rock of the outcrop was metamorphosed 3.58 to 4.031 billion years ago and is the oldest known intact crustal fragment on Earth. These rare fragments can sometimes come as multiple fragments in one box, the photo is the actual specimen or specimen fragments that will be received. Origin : Canada. Era : Pre-Cambrian. Unique : (Actual as seen).