Strange Mars rock type points to extremely violent volcanic eruptions

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An unusual rock type spotted by two Mars rovers may indicate that the Martian landscape was shaped by extremely violent volcanic eruptions. The Nili Fossae region of Mars, which includes the Jezero Crater that NASA's Perseverance rover is currently exploring, is filled with bedrock laden with the volcanic mineral olivine. That same olivine-rich bedrock was also found at the Gusev Crater, where NA...

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