沈ちん降こう海かい岸がん

noun

submerged shoreline; submergent coastline

Technical term in geography and coastal geology. Refers to a coastline formed by land subsidence or sea-level rise, resulting in features like rias and fjords.

• リアス式しき海かい岸がんは沈ちん降こう海かい岸がんの一いっ種しゅである。