- a portion of the earth's crust subjected to downward warping during a large span of geologic time; a geosynclinal fold.
Origin of geosyncline
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for geosyncline
The mountain range can only arise where the geosyncline is deeply filled by long ages of sedimentation.The Birth-Time of the World and Other Scientific Essays
J. (John) Joly
- a broad elongated depression in the earth's crust containing great thicknesses of sediment
Word Origin and History for geosyncline
Online Etymology Dictionary, © 2010 Douglas Harper
- A usually elongate, basinlike depression along the edge of a continent, in which a thick sequence of sediments and volcanic deposits has accumulated.
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