What is the oldest rock in the world?

gneiss
basalt
quartzite
syenite
The Acasta Gneiss in the Canadian Shield in the Northwest Territories, Canada is composed of the Archaean igneous and gneissic cores of ancient mountain chains that have been exposed in a glacial peneplain. Analyses of zircons from a felsic orthogneiss with presumed granitic protolith returned an age of 4.031 ±0.003 Ga.
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Very interesting!
reach: rather globalEarthgeologymineralsrocks

Answers by country

gneiss
basalt
quartzite
syenite
answers
flagGreece
75%
16%
8%
0%
12
flagIndia
71%
9%
9%
9%
32
flagGermany
47%
34%
6%
11%
44
flagPoland
41%
20%
18%
19%
1061
flagthe United States
40%
30%
25%
5%
20
flagthe United Kingdom
37%
31%
18%
12%
16