A type of ferruginous sandstone that is reddish-brown in color; a building stone used in construction.
Compound of 'car' (uncertain etymology, possibly from 'carr' meaning fen or waterlogged ground where such stone was found) and 'stone' (Old English 'stan'); geological term from British usage.
Carstone is a fascinating geological term that survives mainly in British building terminology—the stone itself tells a story of iron-rich sediments and ancient landscapes, while the word connects to older place names.
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