Truncated spur

Bridal Veil Falls in Yosemite National Park. Either side of the waterfall are the flat vertical faces of the truncated spurs
Faulted southeastern side of Svyatoy Nos peninsula, Lake Baikal - active faulting shown by faceted spurs forming triangular facets

A truncated spur is a spur, which is a ridge that descends towards a valley floor or coastline from a higher elevation, that ends in an inverted-V face and was produced by the erosional truncation of the spur by the action of either streams, waves, or glaciers. Truncated spurs can be found within mountain ranges, along the walls of river valleys, or along coastlines.[1][2]

A faceted spur is also a spur that ends in a triangular face, known as a triangular facet, with a broad base and an apex pointing upward. As typically used in geology, the triangular facet is usually a remnant of a fault plane and it and its associated faceted spur are the result of faulting. The term faceted spur is also applied to inverted-V rock faces formed by stream, wave, or glacial erosion and, thus, as a synonym for truncated spur.[1][2]

  1. ^ a b Neuendorf, K.K.E., J.P. Mehl, Jr., and J.A. Jackson, eds. (2005) Glossary of Geology (5th ed.). Alexandria, Virginia, American Geological Institute. 779 pp. ISBN 0-922152-76-4
  2. ^ a b Thornbury, W. D., 1954, Principles of Geomorphology. John Wiley and Sons, Inc. New York. 618 pp. ISBN 978-8123908113