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ANOTHER MEXICAN EARTHQUAKE! Magnitude 7.1, Tuesday Sept. 19, 2017. Why is there no oceanic crust older than 200 million years? SUBDUCTION. • If new oceanic crust is being continuously created along the earth’s spreading ridge system, then we must find some way to re-cycle it back into the mantle.
Identity, Society and Transformative Social Categories: Dynamics of Construction, Configuration and Contestation
- Debal Singharoy