Acasta gneiss
Object 989.092.001
Acasta gneiss
This specimen is a slice from an outcrop of Acasta River gneiss that dates at 3.962 billion years, the oldest known rock in the world. It is called banded tonalite gneiss.
| Accession No. | 989.092.001 |
| Region | Tłı̨chǫ |
| Location | Acasta River |
| Date | 3.9 billion years old |
