igneous

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

"Our capability to infer that the maturation stages were somehow influenced by igneous intrusions based on a small sample size is really exciting!"

One thing about the PVP that delights Coffey is that it is composed of all three kinds of rock — sedimentary, metamorphic and igneous.

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.