Fold (geology)

Folds in paleoproterozoic marble in Nunavut, Canada (with hammer for scale).

Folds in alternating layers of limestone and chert in Crete, Greece.

Rainbow Basin syncline in the Barstow Formation near Barstow, California

An asymmetric angular fold in Ukrainian Carpathians in Dora (near Jaremcze, Ivano-Frankivsk region, West Ukraine

A geological fold occurs when one or a stack of originally flat and planar surfaces, such as sedimentary strata, are bent or curved as a result of permanent deformation. Synsedimentary folds are those due to slumping of sedimentary material before it is lithified. Folds in rocks vary in size from microscopic crinkles to mountain-sized folds. They occur singly as isolated folds and in extensive fold trains of different sizes, on a variety of scales.

单词	Folded rock
释义	Folded rock 英语百科 Fold (geology) A geological fold occurs when one or a stack of originally flat and planar surfaces, such as sedimentary strata, are bent or curved as a result of permanent deformation. Synsedimentary folds are those due to slumping of sedimentary material before it is lithified. Folds in rocks vary in size from microscopic crinkles to mountain-sized folds. They occur singly as isolated folds and in extensive fold trains of different sizes, on a variety of scales.
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Folded rock

Fold (geology)