Mifune Group | |
---|---|
Stratigraphic range: Late Cretaceous, | |
Type | Geological formation |
Sub-units | Jobu Formation, Kabu Formation, Mihune Formation |
Overlies | Unconformity with metamorphic rocks and Permian Mizukoshi Formation |
Thickness | Over 1500 metres |
Location | |
Country | Japan |
The Mifune Group or Mihune Formation is a Mesozoic geologic formation in Japan. It contains dinosaur fossils. [1]
Fossils found in the unit include indeterminate dinosaur remains, the turtles Adocus , Shachemys , and Tienfucheloides , and the pterosaur Nipponopterus . [2] [1] [3]
The Gault Formation is a geological formation of stiff blue clay deposited in a calm, fairly deep-water marine environment during the Lower Cretaceous Period. It is well exposed in the coastal cliffs at Copt Point in Folkestone, Kent, England, where it overlays the Lower Greensand formation, and underlies the Upper Greensand Formation. These represent different facies, with the sandier parts probably being deposited close to the shore and the clay in quieter water further from the source of sediment; both are believed to be shallow-water deposits.
The Demopolis Chalk is a geological formation in North America, within the U.S. states of Alabama, Mississippi, and Tennessee. The chalk was formed by pelagic sediments deposited along the eastern edge of the Mississippi embayment during the middle Campanian age of the Late Cretaceous. It is a unit of the Selma Group and consists of the upper Bluffport Marl Member and a lower unnamed member. Dinosaur and mosasaur remains are among the fossils that have been recovered from the Demopolis Chalk.
The Amagodani Formation is an Early Cretaceous geologic formation in Japan. An indeterminate iguanodontian tooth has been recovered from the formation. as well as indeterminate pterosaur remains. Dinosaur footprints are also known from the formation.
The Douiret Formation is a geologic formation in Tunisia, near the Berber village of Douiret. It is part of the larger Continental Intercalaire Formation, which stretches from Algeria and Niger in the west to Egypt and Sudan in the east. The Douiret Formation is located in the Tataouine basin in southern Tunisia, stretching into Algeria and Libya, and is part of the Merbah el Asfer Group of rock formations. The Douiret is 80 metres thick and consists of a 30-metre layer of sand beneath a 50-metre layer of clay.
The Futaba Group is a Late Cretaceous geologic group in Japan. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus. It consists of both fluvial and shallow marine sediments. The plesiosaur Futabasaurus was found in this unit.
The Intertrappean Beds are a Late Cretaceous and Early Paleocene geologic formation in India. The beds are found as interbeds between Deccan Traps layers, including the slightly older Lameta Formation. The formation spans the Cretaceous–Paleogene boundary, with a stratigraphic range of only a few hundred thousand years before and after the boundary, and a significant debate exists about whether specific sites belong to the Cretaceous or the Paleocene.
The Miria Formation is a Late Cretaceous geologic formation, in Western Australia.
The Molecap Greensand is a Late Cretaceous geologic formation, located in the state of Western Australia in Australia.
The Okurodani Formation is an Early Cretaceous geologic formation in central Honshu, Japan. Part of the Tetori Group, it primarily consists of freshwater continental sediments deposited in a floodplain environment, with occasional volcanic tuffite horizons. It has an uncertain age, probably dating between the Hauterivian and Aptian. An indeterminate iguanodontian dinosaur tooth has been recovered from the formation. Many other fossil vertebrates are known from the KO2 locality
The Early Cretaceous Phu Kradung Formation is the lowest member of the Mesozoic Khorat Group which outcrops on the Khorat Plateau in Isan, Thailand. This geological formation consists of micaceous, brown to reddish-brown siltstone beds with minor brown and grey shale and sandstone beds. Occasional lime-noduled conglomerate occurs.
The Sierra Perenchiza Formation is a late Campanian to late Maastrichtian geologic formation in Spain. Dinosaur, pterosaur, turtle, lissamphibian, frog and albanerpetontid remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus and the crocodylomorphs Acynodon, Doratodon ibericus and Musturzabalsuchus are also known from this formation.
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 Tsagaantsav Formation, Tsagantsab Formation or Tsagan-Tsab Formation is an Early Cretaceous geologic formation in Mongolia. Indeterminate sauropod and psittacosaurid remains have been recovered from the formation. Remains of the pterosaur Noripterus, which were originally given their own genus, "Phobetor" have also been recovered from the formation.
The Hasandong Formation is an Early Cretaceous geologic formation in South Korea. It has been dated to the late Aptian and earliest Albian, between 118.0 ± 2.6 Ma and 112.4 ± 1.3 Ma. Dinosaur remains have been discovered from this formation, though no genus is considered valid as of 2016. Other reptiles from the formation include the adocid turtle Proadocus and possibly the pterosaur Dsungaripterus.
The Akaiwa Formation is an Early Cretaceous (Hauterivian-Barremian) geologic formation in central Honshu, Japan. Indeterminate ornithischian fossils are known from the formation. Fossil ornithopod tracks have been reported from the formation. As well as the turtle Kappachelys
The Jobu Formation is a Cretaceous geologic formation of Late Cenomanian age. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus. The oldest confirmed tyrannosaurid premaxillary tooth was recovered from the Jobu Formation. The mammal Sorlestes is also known from the formation.
The following outline is provided as an overview of and topical guide to dinosaurs:
The Khilok Formation is an Early Cretaceous geologic formation in Buryatia, Russia. While the lower portion of the formation consists of sandstone and conglomerates, the upper portion of the formation largely consists of trachybasalt, these deposits have been dated to the Aptian. A thin 20 cm bed is known from the formation containing the remains of numerous indeterminate vertebrates, including dinosaur and pterosaurs and an indeterminate species of Kirgizemys.
The Zhirkindek Formation is a Late Cretaceous geologic formation in Kazakhstan. The primary lithology is sand with interbeds of clay and silt, and represents a coastal to coastal marine environment. The formation has produced numerous fossils, including Lindholmemydid and Trionychid cryptodires, indeterminate remains of dinosaurs and an indeterminate species of pterosaur Azhdarcho.
Nipponopterus is an extinct genus of azhdarchid pterosaurs from the Late Cretaceous Mifune Group of Japan. The genus contains a single species, N. mifunensis, known from a partial neck vertebra. Nipponopterus represents the first pterosaur to be named from Japan.