: an indurated shale produced by the consolidation of mud
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The mudstone created an environment that could concentrate and preserve organic molecules and trapped them inside the fine grains of the sedimentary rock.—Ashley Strickland, CNN Money, 29 Mar. 2025 Thanks to the preservation-friendly conditions on Mars, these organic compounds remained intact in mudstone for approximately 3.7 billion years — dating back to the period when life first emerged on Earth.—Discover Magazine, 26 Mar. 2025 Buried inside a slab of ancient mudstone in what was once an inlet leading into a lake bounded by Mars’ Jezero Crater, NASA’s Perseverance rover’s sample number 25 is potentially a Martian astrobiological game-changer.—Bruce Dorminey, Forbes, 17 Aug. 2024 Curiosity has already found organic deposits trapped in mudstone that once contained organic molecules.—Harriet Marsden, theweek, 24 July 2024 See All Example Sentences for mudstone
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