The Abu Agag Formation is a
Turonian
The Turonian is, in the ICS' geologic timescale, the second age in the Late Cretaceous Epoch, or a stage in the Upper Cretaceous Series. It spans the time between 93.9 ± 0.8 Ma and 89.8 ± 1 Ma (million years ago). The Turonian is preceded by t ...
geologic
formation
Formation may refer to:
Linguistics
* Back-formation, the process of creating a new lexeme by removing or affixes
* Word formation, the creation of a new word by adding affixes
Mathematics and science
* Cave formation or speleothem, a secondar ...
in
Egypt
Egypt ( ar, مصر , ), officially the Arab Republic of Egypt, is a transcontinental country spanning the northeast corner of Africa and southwest corner of Asia via a land bridge formed by the Sinai Peninsula. It is bordered by the Mediter ...
and
Sudan
Sudan ( or ; ar, السودان, as-Sūdān, officially the Republic of the Sudan ( ar, جمهورية السودان, link=no, Jumhūriyyat as-Sūdān), is a country in Northeast Africa. It shares borders with the Central African Republic t ...
. Indeterminate fossil
ornithischian
Ornithischia () is an extinct order of mainly herbivorous dinosaurs characterized by a pelvic structure superficially similar to that of birds. The name ''Ornithischia'', or "bird-hipped", reflects this similarity and is derived from the Greek s ...
tracks have been reported from the formation.
[Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607]
Description
The formation comprises intercalated
sandstone
Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks.
Most sandstone is composed of quartz or feldspar (both silicates) ...
s and highly
bioturbated sand- and siltstone layers which are horizontal and wavy bedded. Horizontally laminated and thin bedded fine-grained sandstones as well as flaser- and ripple cross-lamination characterize a low-energy environment within this fluvial succession.
Fossil content
The following fossils have been reported from the formation:
Bushmans River, Woodbury Farm
at Fossilworks
Fossilworks is a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database
The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals ...
.org
* '' Paranthodon africanus''
* '' Planolites sp.''
* '' Rhynchosauroides sp.''
* '' cf. Rotodactylus sp.''
* '' Scoyenia sp.''
* '' Spirodesmos sp.''
* Dinosauria indet.
* ?Ornithischia indet.
See also
* List of dinosaur-bearing rock formations
This list of dinosaur-bearing rock formations is a list of geologic formations in which dinosaur fossils have been documented.
Containing body fossils
* List of stratigraphic units with dinosaur body fossils
** List of stratigraphic units with few ...
* List of stratigraphic units with indeterminate dinosaur fossils
This list of stratigraphic units with indeterminate dinosaur fossils includes stratigraphic units of formation rank or higher that have produced dinosaur body fossils, although none of these remains have been referred to a specific genus in the sci ...
** List of stratigraphic units with ornithischian tracks Indeterminate or unspecified ornithischian tracks
Ceratopsians
Ornithopods
Thyreophorans
Ankylosaurs
Stegosaurs
See also
List of dinosaur-bearing rock formations
This list of dinosaur-bearing rock formations is a list of geologic f ...
*** Indeterminate ornithischian tracks
References
Bibliography
* {{ISBN, 0-520-24209-2
Geologic formations of Egypt
Geologic formations of Sudan
Upper Cretaceous Series of Africa
Turonian Stage
Sandstone formations
Siltstone formations
Fluvial deposits
Ichnofossiliferous formations