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In the process they learned that “a mid-crust composed of fractured igneous rocks saturated with liquid water best explains the existing data.”

Now if you were awake in high school science class, you’re thinking, igneous rock: volcanic lava.

Among the new discoveries was finding primary igneous rocks in Jezero Crater.

One popular theory suggests that minerals released by the weathering of igneous rock sucked enough carbon dioxide from the atmosphere to set off a deep freeze.

Some of Rum's igneous rocks have a very similar mineral and chemical content to those found in the Séítah Formation within the Jezero crater on Mars.