Aka: Abnormal Coronary Arteries, Abnormal Coronary Artery, Coronary Artery Abnormalities, Congenital Anomaly of Coronary Artery, Anomalous Coronary Vessel.
Unconformities. Unconformities are gaps in the geologic record that may indicate episodes of crustal deformation, erosion, and sea level variations. They are a feature of stratified rocks, and are therefore usually found in sediments (but may also occur in stratified volcanics).
The Angular Unconformity. The most famous and obvious kind of unconformity is the angular unconformity. Rocks below the unconformity are tilted and sheared off, and rocks above it are level. The angular unconformity tells a clear story: 1  First a set of rocks was laid down. 2  Then these rocks were tilted, then eroded down to a level surface.