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geosyncline

American  
[jee-oh-sin-klahyn] / ˌdʒi oʊˈsɪn klaɪn /

noun

Geology.

  1. a portion of the earth's crust subjected to downward warping during a large span of geologic time; a geosynclinal fold.

geosyncline British  
/ ˌdʒiːəʊˈsɪŋklaɪn /

noun

  1. a broad elongated depression in the earth's crust containing great thicknesses of sediment

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
geosyncline Scientific  
/ jē′ō-sĭn′klīn′ /

  1. A usually elongate, basinlike depression along the edge of a continent, in which a thick sequence of sediments and volcanic deposits has accumulated.

Other Word Forms

Etymology

Origin of geosyncline

First recorded in 1890–95; geo- + syncline

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.