![Gneiss from Greenland 3,600,000,000 years old. One of the oldest rocks on Earth, this is a paragneiss, a sedimentary rock that has been metamorphosed at high temperatures and pressures. It comes from Gneiss from Greenland 3,600,000,000 years old. One of the oldest rocks on Earth, this is a paragneiss, a sedimentary rock that has been metamorphosed at high temperatures and pressures. It comes from](https://c8.alamy.com/comp/D989M6/gneiss-from-greenland-3600000000-years-old-one-of-the-oldest-rocks-D989M6.jpg)
Gneiss from Greenland 3,600,000,000 years old. One of the oldest rocks on Earth, this is a paragneiss, a sedimentary rock that has been metamorphosed at high temperatures and pressures. It comes from
![PME UBC on X: "Behold one of the oldest rocks on Earth, the Acasta Gneiss! Considering that the Earth is estimated to be 4.6 billion years old, this 4.03 billion years old PME UBC on X: "Behold one of the oldest rocks on Earth, the Acasta Gneiss! Considering that the Earth is estimated to be 4.6 billion years old, this 4.03 billion years old](https://pbs.twimg.com/media/FzkmPhlaYAAC-Xu.jpg:large)
PME UBC on X: "Behold one of the oldest rocks on Earth, the Acasta Gneiss! Considering that the Earth is estimated to be 4.6 billion years old, this 4.03 billion years old
![Acasta Gneiss, NW Canada. The oldest known rock on Planet Earth (4.031 Billion years old +/- 0.… | Rocks and minerals, Minerals and gemstones, Geology rocks mineral Acasta Gneiss, NW Canada. The oldest known rock on Planet Earth (4.031 Billion years old +/- 0.… | Rocks and minerals, Minerals and gemstones, Geology rocks mineral](https://i.pinimg.com/474x/51/52/bb/5152bb9bdeccb6186942a493be07868a.jpg)