mudstone

noun

mud·​stone ˈməd-ˌstōn How to pronounce mudstone (audio)
: an indurated shale produced by the consolidation of mud

Examples of mudstone in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Curiosity has climbed through a vertical half-mile (1 kilometer) of rock layers so far, finding clay-rich, mudstone layers that give way at higher elevations to younger sandstones full of salty minerals. — Ashwin R. Vasavada, The Conversation, 27 Aug. 2026 At a fossil site in northwestern Canada called Raven’s Throat River, the mudstone still holds 500-million-year-old coprolites, some as wide as five centimeters, along with complete fossils of trilobites and mollusk-like hyoliths with conical shells. — ArsTechnica, 12 Aug. 2026 The finding also marks the first identification of this type of carbon in Martian mudstones outside Gale Crater, where NASA’s Curiosity rover continues to explore. — Aamir Khollam, Interesting Engineering, 25 June 2026 The crew found organic carbon inside two mudstones. — Chelsea Gohd, Space.com, 24 June 2026 See All Example Sentences for mudstone

Word History

First Known Use

circa 1736, in the meaning defined above

Time Traveler
The first known use of mudstone was circa 1736

Rhymes for mudstone

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Browse Nearby Words

mud-star
mudstone
mudsucker
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Cite this Entry

“Mudstone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mudstone. Accessed 4 Sep. 2026.

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More from Merriam-Webster on mudstone

Britannica.com: Encyclopedia article about mudstone

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