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eugeosyncline

[ yoo-jee-oh-sing-klahyn, -sin- ]
/ yuˌdʒi oʊˈsɪŋ klaɪn, -ˈsɪn- /
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noun Geology.
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.
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Origin of eugeosyncline

First recorded in 1940–45; eu- + geosyncline

OTHER WORDS FROM eugeosyncline

eu·ge·o·syn·cli·nal, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022
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