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[[File:Hutton Unconformity,_Jedburgh.jpg|thumb|500px|Hutton Unconformity at en:Jedburgh, Scotland, illustrated by John Clerk in 1787 with a recent photography (2003) by Keith Montgomery. The Jedburgh - Newcastle road (A68) is above the section. The section is located about 5 minutes walk from the Jedburgh Abbey, on the outskirts of the town. This is a good example of an "angular unconformity" in which tilted sedimentary beds are overlain by horizontal beds. This unconformity represents a long gap in the record of geological time, during which deposition had ceased and folding or faulting occurred, the lower strata tilted, and then deposition resumed.]]
==Useful links==
==Useful links==
* [http://geology.about.com/od/geoprocesses/a/unconformities.htm Unconformities, angular unconformities, disconformities, etc.]
* [http://geology.about.com/od/geoprocesses/a/unconformities.htm Unconformities, angular unconformities, disconformities, etc.]
* [http://geoscience.unlv.edu/pub/rowland/Virtual/geology.html The Great Unconformity]
* [http://geoscience.unlv.edu/pub/rowland/Virtual/geology.html The Great Unconformity]
* [http://www.cliffsnotes.com/sciences/geology/geologic-structures/unconformities CliffsNotes.com]
* [https://en.wikipedia.org/wiki/Unconformity Wikipedia]
* [http://geotripperimages.com/Tectonic_Processes/Unconformities.htm Pictures of unconformities]
* [http://geotripperimages.com/Tectonic_Processes/Unconformities.htm Pictures of unconformities]
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