mudstone

noun

mud·​stone ˈməd-ˌstōn 

: an indurated shale produced by the consolidation of mud

Examples of mudstone in a Sentence

Recent Examples on the Web

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

One display shows two Georgia O’Keeffe paintings and a Helen Torr canvas side-by-side with a large septarian nodule (a geological concretion combining mudstone, limestone, and other minerals) that plainly resembles the artworks. — Brian Boucher, ARTnews.com, 8 June 2026

Word History

First Known Use

circa 1736, in the meaning defined above

Rhymes for mudstone

• alone
• atone
• backbone
• bemoan
• bluestone
• breastbone
• brownstone
• capstone
• cheekbone
• condone
• curbstone
• cyclone