
The SciencesSeptember 1, 1983
The Continental Crust
It is much older than oceanic crust, some of it dating back nearly four billion years. It is constantly reworked, however, by cycles of tectonics, volcanism, erosion and sedimentation

The Continental Crust
It is much older than oceanic crust, some of it dating back nearly four billion years. It is constantly reworked, however, by cycles of tectonics, volcanism, erosion and sedimentation