沈ちん水すい海かい岸がん

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Meanings

1

noun

submergent coastline; submerged coast

A geographical term for a coastline formed by relative sea-level rise, often characterized by drowned river valleys or fjords. Synonymous with 沈降海岸.

沈ちん降こう海かい岸がん
Synonym; both refer to a coastline formed by subsidence or sea-level rise.
離り水すい海かい岸がん
Antonym; an emergent coastline formed by relative sea-level fall.

Compound of 沈水 (submergence) + 海岸 (coast). A calque of English 'submergent coastline'.