Chevron (geology)
Encyclopedia
A chevron in geology
Geology
Geology is the science comprising the study of solid Earth, the rocks of which it is composed, and the processes by which it evolves. Geology gives insight into the history of the Earth, as it provides the primary evidence for plate tectonics, the evolutionary history of life, and past climates...
refers to a chevron-shaped fold
Fold (geology)
The term fold is used in geology 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...
in stratum
Stratum
In geology and related fields, a stratum is a layer of sedimentary rock or soil with internally consistent characteristics that distinguish it from other layers...
layers. Chevron folds are generally close to tight (interlimb angles 70 to 10 degrees) with straight limbs and small angular hinges. They typically form in multilayers, consisting of regular alternations of beds with contrasting mechanical properties e.g. sandstones and mudstones.
