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).
For geologists, one of the most famous angular unconformity is the Grand Unconformity in the Grand Canyon of Arizona. Here tilted sedimentary rocks of Precambrian age (lower half of photo) are overlain by younger sedimentary rocks of Phanerozoic age (Cambrian and younger, upper half of photo).onconformities are unconformities that separate igneous or metamorphic rocks from overlying sedimentary rocks. They usually indicate that a long period of erosion occurred prior to deposition of the sediments (several km of erosion necessary).