Fold (geology)
Videos
In structural geology, a fold is a stack of originally planar surfaces, such as sedimentary strata, that are bent or curved during permanent deformation. Folds in rocks vary in size from microscopic c
Folds of alternate layers of limestone and chert occur in Greece. The limestone and chert were originally deposited as flat layers on the floor of a deep sea basin. These folds were produced by Alpine deformation.
Kink band folds in the Permian of New Mexico, USA
Rainbow Basin syncline in the Barstow Formation near Barstow, California
Chevron folds, Ireland
Vergence (geology)
Videos
In structural geology, vergence refers to the direction of the overturned component of an asymmetric fold. In simpler terms, vergence can be described as the horizontal direction in which the upper co
A thrust fault with southward dip and northward vergence
Hans Wilhelm Stille, 1941
Small-scale rock folding
Folded rocks in Penhalt Cliff