fold
1fold
noun \ˈfōld\Definition of FOLD
Origin of FOLD
2fold
transitive verbDefinition of FOLD
First Known Use of FOLD
3fold
verbDefinition of FOLD
Origin of FOLD
4fold
nounDefinition of FOLD
First Known Use of FOLD
fold
noun (Concise Encyclopedia)In geology, an undulation or wave in the stratified rocks of the Earth's crust. Stratified rocks were originally formed from sediments that were deposited in flat, horizontal sheets, although in some places the strata are no longer horizontal but have warped. The warping may be so gentle that the inclination of the strata is barely perceptible, or it may be so pronounced that the strata of the two flanks are essentially parallel or nearly flat. Folds vary widely in size; the tops of large folds are commonly eroded away on the Earth's surface.
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