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Double-dunk tectonics


Continental crust is less dense than that of the oceans, and less likely to sink into the mantle. Nevertheless, an analysis of a high-pressure rock from the Swiss Alps suggests that more than one cycle of crustal sinking and return is possible.

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Figure 1: Peridotite body in the southwestern portion of the Adula nappe, Swiss Alps.



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Correspondence to Hannes K. Brueckner.

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Brueckner, H. Double-dunk tectonics. Nature Geosci 4, 136–138 (2011).

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