Key component of Earth's crust formed from moving molten rock

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Layers of metamorphic rock similar to granulite in British Columbia. The coin is shown to provide scale. Credit: Gabriela Depine
Layers of metamorphic rock, similar to granulite, in British Columbia. The coin is shown to provide scale. Credit: Gabriela Depine

Earth scientists are in the business of backing into history -- extrapolating what happened millions of years ago based on what they can observe now. Using this method, a team of Cornell researchers has created a mathematical computer model of the formation of granulite, a fine-grained metamorphic rock, in the Earth's crust.


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