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Geophysics

Hot blanket in Earth's deep crust

Studies of rocks from Earth's crust suggest that the lower crust is a good thermal insulator. The knock-on effects of this finding are many — one being the crust's increased potential to generate more magma.

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Figure 1: Thermal conductivity and temperature in Earth's crust.
Figure 2: Implications of a lower crust that is warmer than expected.

References

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Braun, J. Hot blanket in Earth's deep crust. Nature 458, 292–293 (2009). https://doi.org/10.1038/458292a

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