eugeosyncline

American  

[yoo-jee-oh-sing-klahyn, -sin-] / juˌdʒi oʊˈsɪŋ klaɪn, -ˈsɪn- /

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.

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Other Word Forms

• eugeosynclinal
  adjective

Etymology

Origin of eugeosyncline

First recorded in 1940–45; eu- + geosyncline