Fault gouge

Fault gouge is an unconsolidated tectonite (a rock formed by tectonic forces) with a very small grain size. Fault gouge has no cohesion, it is normally an unconsolidated rock type, unless cementation took place at a later stage. Fault gouge forms in the same way as fault breccia, the latter also having larger clasts. [Twiss, R.J. & Moores, E.M., 2000 (6th edition): "Structural Geology", W.H. Freeman & co, ISBN 0-7167-2252-6; p. 55]

Origin

Fault gouge forms by tectonic movement along a localized zone of brittle deformation (a fault zone) in a rock. The grinding and milling that results when the two sides of the fault zone move along each other results in a material that is made of loose fragments. First a fault breccia will form, but if the grinding continues the rock becomes fault gouge.

ee also

*Shale Gouge Ratio (SGR)
*Fault breccia
*Fault (geology)

References


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • fault gouge —    A clay like material occurring between the walls of a fault as a result of the movement along the fault surfaces …   Lexicon of Cave and Karst Terminology

  • fault gouge — noun Accumulated crushed rock debris which is the product of the movement of the rocks on each side of a fault …   Wiktionary

  • fault gouge — noun : finely comminuted uncemented rock characteristic of fault zones …   Useful english dictionary

  • Fault breccia — (IPA: /ˈbrɛtʃiə, ˈbrɛʃ /, Italian: breach), or tectonic breccia is a breccia (a rock type consisting of angular clasts) that was formed by tectonic forces. Fault breccia has no cohesion, it is normally an unconsolidated rock type, unless… …   Wikipedia

  • Fault (geology) — Part of a series on earthquakes Types Foreshock • Aftershock • Blind thrust Doublet • Interplate • …   Wikipedia

  • Gouge — For the unconsolidated sediment formed by rock shearing in fault zones, see Fault gouge and Shale Gouge Ratio. Gouge refers to one of several types of cutting tools, in addition to its meaning as a verb ( the action of cutting or scooping with or …   Wikipedia

  • fault — /fawlt/, n. 1. a defect or imperfection; flaw; failing: a fault in the brakes; a fault in one s character. 2. responsibility for failure or a wrongful act: It is my fault that we have not finished. 3. an error or mistake: a fault in addition. 4.… …   Universalium

  • fault zone —    A fault that is expressed as a zone of numerous small fractures or of breccia or fault gouge. A fault zone may be as wide as hundreds of meters.    Compare: fault, fault line scarp.    GG …   Glossary of landform and geologic terms

  • gouge — gouger, n. /gowj/, n., v., gouged, gouging. n. 1. a chisel having a partly cylindrical blade with the bevel on either the concave or the convex side. 2. an act of gouging. 3. a groove or hole made by gouging. 4. an act of extortion; swindle. 5.… …   Universalium

  • gouge — [[t]gaʊdʒ[/t]] n. v. gouged, goug•ing 1) bui a chisel having a partly cylindrical blade with the bevel on either the concave or the convex side 2) bui an act of gouging 3) bui a hole made by gouging 4) an act of extortion; swindle 5) gel a) a… …   From formal English to slang


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.