Crust
De Dictionnaire geolien
Croûte |
Layer of the Earth above the Mohorovičic discontinuity and the upper mantle.
Continental crust
- Average thickness : 35 km to 80 km
- Density : 2.67 to 2.8
- Fragile upper crust, ductile lower crust
- Maximal age : around 4.4 Ga
Oceanic crust
- Average thickness : 7 km
- Density : 2.9
- Fragile
- Maximal age : around 200 Ma
Linked terms
Source
Cours de P. Angrand : Harmonisation en géosciences