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Deep formation of Earth's earliest continental crust consistent with subduction - Nature Geoscience

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Deep formation of Earth's earliest continental crust consistent with subduction - Nature Geoscience

About four billion years ago, Earth's outer layer is thought to have been composed mostly of a 25- to 50-km-thick basaltic crust that differentiated to form the oldest stable continental crust. However, the tectonic processes responsible for the formation of this continental material remain controversial. Suggested explanations include convergent plate boundary processes akin to subduction operating today and a variety of relatively shallow (<50 km) non-plate-tectonic intracrustal mechanisms.

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Deep formation of Earth's earliest continental crust consistent with subduction - Nature Geoscience

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Deep formation of Earth's earliest continental crust consistent with subduction - Nature Geoscience

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