wrinkle ridge

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wrinkle ridge (mare ridge) A broad, curvilinear swell up to 500 m high and 10km wide, topped by a narrow, steep-sided ridge up to 200 m high and 2–4 km wide, extending for tens to hundreds of kilometres concentrically near the edges of lunar mare basins. They are compressional in origin, possibly due to subsidence of mare lavas.

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