Editing Thrust fault (section)

===Reverse faults===
A thrust fault is a type of [[Fault (geology)#Dip-slip faults|reverse fault]] that has a [[strike and dip|dip]] of 45 degrees or less.<ref name="USGSGloss">{{cite web | url=https://earthquake.usgs.gov/learn/glossary/?term=dip%20slip | title=dip slip | publisher=United States Geological Survey | work=Earthquake Glossary | access-date=5 December 2017}}</ref><ref name="UCSB">{{cite web | url=http://scienceline.ucsb.edu/getkey.php?key=2845 | title=How are reverse faults different than thrust faults? In what way are they similar? | publisher=[[University of California, Santa Barbara]] | work=UCSB Science Line | date=13 February 2012 | access-date=5 December 2017}}</ref>

If the angle of the fault plane is lower (often less than 15 degrees from the horizontal<ref name="Crosby1967">{{cite journal | url=http://archives.datapages.com/data/cspg/data/015/015003/0219.htm | title=High Angle Dips at Erosional Edge of Overthrust Faults | author=Crosby, G. W. | journal=Bulletin of Canadian Petroleum Geology | year=1967 | volume=15 | issue=3 | pages=219–229}}</ref>) and the displacement of the overlying block is large (often in the kilometer range) the fault is called an ''overthrust'' or ''overthrust fault''.<ref name="Glossary2005">{{cite book | title=Glossary of Geology | publisher=American Geological Institute | editor-last1=Neuendorf | editor-first1=K. K. E. | editor-last2=Mehl Jr. | editor-first2=J. P. | editor-last3=Jackson | editor-first3=J. A.| year=2005 | location=Alexandria, Virginia | page=462| edition=5th }}</ref> Erosion can remove part of the overlying block, creating a ''fenster'' (or ''[[Window (geology)|window]]'') – when the underlying block is exposed only in a relatively small area. When erosion removes most of the overlying block, leaving island-like remnants resting on the lower block, the remnants are called ''klippen'' (singular ''[[klippe]]'').