The contact between the Cardenas Basalt and the overlying Nankoweap Formation is an erosion surface that is a disconformity or even a slight angular unconformity.
12.
The upper contact, which is part of the Great Unconformity, of the Sixtymile Formation is a disconformity that laterally becomes an angular unconformity.
13.
The youngest fauna are Maastrichtian, with an apparent disconformity between the Late Cretaceous and Paleocene, marked by high levels of gamma radiation on logs.
14.
The third stage is represented by regional uplift, which accompanied the collision of an Avalon terrane with a promontory, and subsequently, developed a regional disconformity.
15.
Within the Marble Canyon and eastern Grand Canyon regions and south into Verde Valley, upper contact of the Kaibab Limestone with the Moenkopi Formation is an erosional disconformity.
16.
The upper contact is a disconformity that typically consists of nearly horizontal surfaces with little or no relief and overlain locally by a basal conglomerate within the overlying Redwall Limestone.
17.
Within the Shinumo Quartzite, a basal lag composed of a layer of conglomerate, which contains basement clasts up to across, lies on the eroded surface that forms this disconformity.
18.
Within the lower subarkose of the Shinumo Sandstone, a basal lag of conglomerate, which contains basement clasts up to across, lies on the eroded surface that forms this disconformity.
19.
The upper contact of the Redwall Limestone consists of a deeply eroded disconformity characterized by deeply incised paleovalleys and deep paleokarst depressions that are often filled by sediments of the Surprise Canyon Formation.
20.
This disconformity is widely assumed to be equivalent to the Hardegsen disconformity of the central European / Southern North Sea Basin, although the age of this disconformity is not constrained as it is in Europe by biostratigraphical indicators
