Dukamaje Formation

Last updated
Dukamaje Formation
Stratigraphic range: Maastrichtian [1]
Type Geological formation
Sub-unitsGypsiferous shale Member
Lithology
Primary Mudstone, shale
Other Siltstone, marl, gypsum
Location
Coordinates 15°24′N5°48′E / 15.4°N 5.8°E / 15.4; 5.8
Approximate paleocoordinates 5°06′N0°36′E / 5.1°N 0.6°E / 5.1; 0.6
Region Tahoua
Sokoto
CountryFlag of Niger.svg  Niger
Flag of Nigeria.svg  Nigeria
Extent Iullemmeden Basin
Type section
Named forDukamaje, Sokoto, Nigeria
Niger relief location map.jpg
Lightgreen pog.svg
Dukamaje Formation (Niger)

The Dukamaje Formation is a geological formation in Niger and Nigeria whose strata date back to the Late Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation. [1] A wealth of Mosasaur fossils have also been recovered from this formation, particularly from the area around Mt. Igdaman. [2]

Contents

Fossil content

Dinosaurs of the Dukamaje Formation
TaxaPresenceDescriptionImages

Genus:

  1.  ?B. ingens. [1]
  1. Geographically present in Département De Tahoua, Niger. [1]
Mosasaurs of the Dukamaje Formation
TaxaPresenceDescriptionImages
Genus:
  1. I. aegyptiacus [2]
  1. Geographically present on Mt. Igdaman, near the village of Igdaman (or In Daman). [2]
Mid-sized globidensine mosasaur. [3] Originally described as a plioplatecarpine. Durophagous. [2]
Goronyosaurus and juvenile elasmosaurs Goronyosaurus nigeriensis abelov.jpg
Goronyosaurus and juvenile elasmosaurs
Genus:
  1. G. nigeriensis
  2. G. sp. [2]
  1. Type locality unknown. From the portion of the Dukamaje Formation located in Nigeria.
  2. Geographically present on Mt. Igdaman. From the portion of the Dukamaje Formation located in Niger. [2]
Large mosasaur of uncertain affiliations. High number of foramina on the snout and small eyes indicate a murky-water hunter. [4]
Genus:
  1.  ?A. sp. [2]
  1. Geographically present on Mt. Igdaman. [2]
Represented here by four vertebrae, one from a juvenile. Fragmentary state makes identification difficult. [2]
Genus:
  1. H. sp. [2]
  1. Geographically present on Mt. Igdaman. [2]
Mid-sized mosasaur. Represented here by four vertebrae. [2]
Genus:
  1. P. sp. [2]
  1. Geographically present on Mt. Igdaman. [2]
Mid-sized plioplatecarpine mosasaur. Represented here by several vertebrae. [2]
Genus:
  1. P. sp. [2]
  1. Geographically present on Mt. Igdaman. [2]
Mid-sized plioplatecarpine mosasaur. Represented here by a single fragmentary vertebrae. [2]
Genus:
  1. cf. M. hoffmannii [2]
  1. Geographically present on Mt. Igdaman. [2]
Massive mosasaurine mosasaur. Represented here by a fragmentary tooth crown. The first example of Mosasaurus from Niger and Nigeria. [2]
Other reptiles
Fishes

See also

Related Research Articles

<span class="mw-page-title-main">Romualdo Formation</span> Brazilian geologic formation

The Romualdo Formation is a geologic Konservat-Lagerstätte in northeastern Brazil's Araripe Basin where the states of Pernambuco, Piauí and Ceará come together. The geological formation, previously designated as the Romualdo Member of the Santana Formation, named after the village of Santana do Cariri, lies at the base of the Araripe Plateau. It was discovered by Johann Baptist von Spix in 1819. The strata were deposited during the Aptian stage of the Early Cretaceous in a lacustrine rift basin with shallow marine incursions of the proto-Atlantic. At that time, the South Atlantic was opening up in a long narrow shallow sea.

The Echkar Formation is a geological formation comprising sandstones and claystones in the Agadez Region of Niger, central Africa.

The Tiourarén Formation is a geological formation in the Agadez Region of Niger whose strata were originally thought to be Early Cretaceous. However, re-interpretation of the sediments showed that they are probably Middle-Late Jurassic (Bathonian-Oxfordian) in age. It is the uppermost unit of the Irhazer Group. Dinosaur remains are among the fossils that have been recovered from the formation.

The Farak Formation is a geological formation in Niger, central Africa.

The Dinosaur Beds is a geological formation in Malawi whose strata date back to the Early Cretaceous. The age of the deposit is poorly constrained, but is likely to date from the Barremian to Aptian. Dinosaurs, turtles and crocodylomorphs remains are among the fossils that have been recovered from the formation. It is correlated with the Galula Formation in Tanzania. It consists of two members, a lower unfossiliferous member consisting of deep red stained sandstones, and an upper fossiliferous member consisting of white sands and grey to red mudstones and siltstones. The upper member is 210 m thick in the vicinity of the CD-9 locality.

The Wadi Milk Formation is a geological formation in Sudan whose strata date back to the Late Cretaceous. Originally, the formation was thought to be Albian to Cenomanian, later research has provided dating to the Campanian to Maastrichtian. Dinosaur remains are among the fossils that have been recovered from the formation. It stretches from the lower Wadi Al-Malik across the Wadi Muqaddam into the Bayuda Desert.

The Ankarafantsika Formation is a Late Cretaceous (Cenomanian) geologic formation of the Mahajanga Basin in the Boeny region of Madagascar, Africa. The fine-grained sandstones of the formation were deposited in a fluvial to lacustrine environment.

The Gokwe Formation is an Early Cretaceous geologic formation in Zimbabwe. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus. Sediments of the formation may have been laid down in a small shallow lake, carried by intermittent floods from a land surface surrounding the lake on which aeolian transport of sand took place. More likely the animals died on a dry lake bed, and their bones were exposed to a period of desiccation, later floods would scatter the fragments and incorporate them in sediment.

<span class="mw-page-title-main">Hidden Lake Formation</span> Geologic formation in Antarctica

The Hidden Lake Formation is a Late Cretaceous geologic formation in Antarctica. The sandstones and siltstones of the formation were deposited in a deltaic environment.

The In Beceten Formation, also Beceten or Ibecten is a Coniacian to Santonian geologic formation in the Iullemmeden Basin of Niger. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus. The lithology primarily consists of clays, fine limestones and sandy clays.

The Lupata Group is an Aptian geologic group in the Tete Province of Mozambique and the Northern Region of Malawi. The group contains the Dinosaur Beds, a fossiliferous unit in Malawi that has provided dinosaur remains. eubidono assistente redigido gaseificada lexosh vasos paciência caeuv 519 - 603 < / r e f> pp laeibu catódicos caleidoscopio existe vaeknkri casino brindado

The Molecap Greensand is a Late Cretaceous geologic formation, located in the state of Western Australia in Australia.

The Tahora Formation is a Late Cretaceous geologic formation that outcrops in northeastern New Zealand near Napier. It is Haumurian in age according to the New Zealand geologic time scale. It forms part of the Upper Cretaceous to Teurian (Danian) Tinui Group. It unconformably overlies the Jurassic to Lower Cretaceous Urewera Group or the Upper Cretaceous Matawai Group. It is conformably overlain by the Haumurian to Teurian Whangai Formation. It consist of three members, the Maungataniwha Sandstone Member, the Mutuera Member and the Houpapa Member. It is named for Tahora Station, south of Matawai in the Gisborne Region. The aptly named Maungataniwha Sandstone Member is known for its rich reptile fossil remains, first investigated by amateur palaeontologist Joan Wiffen.

The Williams Fork Formation is a Campanian (Edmontonian) geologic formation of the Mesaverde Group in Colorado. Dinosaur remains are among the fossils that have been recovered from the formation, most notably Pentaceratops sternbergii,. Other fossils found in the formation are the ammonite Lewyites, neosuchian crocodylomorphs, and the mammals Glasbius and Meniscoessus collomensis.

The Ankazomihaboka Formation is a Coniacian geologic formation in the Mahajanga Basin of northwestern Madagascar. The formation comprises claystones and sandstones deposited in a fluvial to lacustrine environment. The formation is overlain by the Marovoay Beds and overlies basalt.

The Severn Formation is a Mesozoic geologic formation in Maryland. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.

The Irhazer Shale or Irhazer II Formation is a Middle Jurassic geologic formation of the Irhazer Group in the Agadez Region of Niger. Fossil ornithopod tracks have been reported from the formation. The dinosaur Spinophorosaurus is known from the formation.

References

  1. 1 2 3 4 5 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. ISBN   0-520-24209-2.
  2. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Lingham-Soliar, Theagarten (1991). "Mosasaurs from the upper Cretaceous of Niger". Palaeontology. 34: 653–670.
  3. Lindgren, Johan (2005). "Dental and vertebral morphology of the enigmatic mosasaur Dollosaurus (Reptilia, Mosasauridae) from the lower Campanian (Upper Cretaceous) of southern Sweden". Bulletin of the Geological Society of Denmark. 52: 17–25. doi: 10.37570/bgsd-2005-52-03 .
  4. "Tongues, venom glands, and the changing face of Goronyosaurus". Tetrapod Zoology. Retrieved 2017-01-11.
  5. Gilbedi Hills, Rima River at Fossilworks.org
  6. Mont Igdaman (bed 25) at Fossilworks.org
  7. In Touhout (bed 4) at Fossilworks.org

Further reading