Folds are some of the most common geological phenomena you see in the world – a geological fold occurs when planar (usually sedimentary) layers are curved and/or bent, permanently deformed due to outside pressure. Folds’ sizes can vary from microscopic to mountain sized.

The folds of the rocks at position Apoplystra

The folds of the rocks at position Apoplystra, between the village of St. Paul and the sandhills (Greece) are remarkably colorful.
Photo credit: © by G. Shuttleworth.

Slump Folds at Antipaxos Island in Greece

Slump Folds, Oligocene carbonate sediments exposed on the Ionian Island of Antipaxos, Greece.
Photo credit:  : © Maki Doukouros

The Sideling Hill, Maryland, USA

The Sideling Hill rock cut is famous for its impressive geologic display, exposing layers of sedimentary rock folded in a broad syncline.
Photo credit: Schnabel Engineering, Inc.

Folded Carbonates flysch, France

Folded Carbonates flysch in Basque Country, France.
Photo credit: Thibault Cavailhes

The Chevron folds, North Cornwall, United Kingdom

Chevron folds are a structural feature characterized by repeated well behaved folded beds with straight limbs and sharp hinges. Well developed, these folds develop repeated set of v-shaped beds. They develop in response to regional or local compressive stress. Inter-limb angles are generally 60 degrees or less.
Photo credit: Nik on Flickr

Mount Head, Canada

Located in the Highwood River Valleysouth of Head Creek and north of Wileman Creek. Highwood Range, Kananaskis Park, Alberta
Photo credit: ZME Science

Richat Structure, Sahara desert of Mauritania

The Richat Structure in the Sahara Desert of Mauritania. Long considered to be an impact structure, it is now believed by most to be a structural dome. The Richat Structure is a deeply eroded, slightly elliptical dome with a diameter of 40 km. The sedimentary rock exposed in this dome ranges in age from Late Proterozoic within the center of the dome to Ordovician sandstone around its edges
Photo credit: Viva NOLA on Flickr

The Folded layers in valley in Namibia

Geologic Folds in the Lower Ugab valley in Namibia.
Photo credit: Unknown

Folded beds at Eilat mountains, Israel

Some seriously folded and faulted rocks at Eilat mountains, southern Israel.
Photo Credit: Iyad M. Swaed

Folded banded iron formation, Minnesota

Folded banded iron formation with shale interbeds, exposed in a pavement near Soudan, Minnesota.
Photo Credit: Callan Bentley/American Geophysical Union

Read also: The Terminology of a Fold
See also: Types of folds with Photos

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