This video shows how an angular unconformity develops. An unconformity is a geologic feature that forms when sediment deposition is interrupted and some material is eroded before deposition resumes. Interruptions in deposition can be caused by sea level changes, tectonic uplift, and other mechanisms. An angular unconformity is one type of unconformity that occurs when the lower rock layers are tilted before being partially eroded and buried by new sediment.

The angular unconformity shown in this video is located in Box Canyon, Ouray, Colorado. This video was specifically developed for and is on display at the Visitor Center at the Box Canon Park.

Watch on our website: http://igp.colorado.edu/library/video...