The Wadi Milk Formation is a geological

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 ...

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 ...

whose strata date back to the

Late Cretaceous The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''creta'', the ...

. Originally, the formation was thought to be

Albian The Albian is both an age of the geologic timescale and a stage in the stratigraphic column. It is the youngest or uppermost subdivision of the Early/Lower Cretaceous Epoch/Series. Its approximate time range is 113.0 ± 1.0 Ma to 100.5 ± 0.9 M ...

Cenomanian The Cenomanian is, in the ICS' geological timescale, the oldest or earliest age of the Late Cretaceous Epoch or the lowest stage of the Upper Cretaceous Series. An age is a unit of geochronology; it is a unit of time; the stage is a unit in the s ...

, later research has provided dating to the

Campanian The Campanian is the fifth of six ages of the Late Cretaceous Epoch on the geologic timescale of the International Commission on Stratigraphy (ICS). In chronostratigraphy, it is the fifth of six stages in the Upper Cretaceous Series. Campanian s ...

Maastrichtian The Maastrichtian () is, in the ICS geologic timescale, the latest age (uppermost stage) of the Late Cretaceous Epoch or Upper Cretaceous Series, the Cretaceous Period or System, and of the Mesozoic Era or Erathem. It spanned the interval from ...

. Dinosaur remains are among the fossils that have been recovered from the formation.Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, Africa)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 604-605. . It stretches from the lower

Wadi Al-Malik Wadi Al-Malik is the bed of an extinct river in Sudan. Following the Central African Shear Zone, it stretches for 560 km from the lake of Umm Badr in North Kurdufan NE-trending to the great bend of the Nile near Al Dabbah Al Dabbah (also ...

across the

Wadi Muqaddam Geography Wadi Muqaddam is a dry water course some 320 km extending from beyond Omdurman north to the great bend of the Nile near Korti. It gives its name to the geological Wadi Milk Formation. Delimiting the Bayuda Desert to the west it stil ...

into the

Bayuda Desert The Bayuda Desert, located at , is in the eastern region of the Sahara Desert, spanning approximately 100,000 km2 of northeast Sudan north of Omdurman and south of Korti, embraced by the great bend of the Nile in the north, east and south a ...

.Oliver W.M.Rauhut, A Dinosaur Fauna from the Late Cretaceous (Cenomanian) of Northern Sudan. In: Palaeontologie africaine,35,61-84(1999)

Vertebrate paleofauna

Ornithischians

Saurischians

References

{{Reflist Geologic formations of Sudan Upper Cretaceous Series of Africa Campanian Stage Maastrichtian Stage Sandstone formations Siltstone formations Fluvial deposits Lacustrine deposits Fossiliferous stratigraphic units of Africa Paleontology in Sudan

Vertebrate paleofauna

Ornithischians

Saurischians

See also

References