eugeosyncline

[ yoo-jee-oh-sing-klahyn, -sin- ]

noun

, Geology.

1. a former marine zone, bordering an ocean basin, marked by very thick deposits of sediment in which the products of volcanic activity are associated with clastic sediments.

Other Words From

• eu·geo·syn·clinal adjective

Word History and Origins

Origin of eugeosyncline¹

First recorded in 1940–45; eu- + geosyncline