- a synclinal fold.
Origin of syncline
First recorded in 1870–75; back formation from synclinal
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for syncline
"The porphyry dykes here are in syncline," the engineer went on.Rimrock Trail
J. Allan Dunn
When the arch is reversed, like this , it is called a syncline.
Looking north from the Central Downs over the Solent we are looking at a syncline.
There each mountain-ridge corresponds to an anticline, and each valley to a syncline, or trough-shaped arrangement of strata.Fragments of Earth Lore
The whole mountain is part of a syncline, the beds dipping into it from the north-west and south-east.
- a downward fold of stratified rock in which the strata slope towards a vertical axisCompare anticline
C19: from syn- + Greek klīnein to lean
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
Word Origin and History for syncline
1873, back-formation from synclinal.
Online Etymology Dictionary, © 2010 Douglas Harper
- A fold of rock layers that slope upward on both sides of a common low point. Synclines form when rocks are compressed by plate-tectonic forces. They can be as small as the side of a cliff or as large as an entire valley. Compare anticline.
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