The Luohandong Formation is an

Early Cretaceous The Early Cretaceous (geochronology, geochronological name) or the Lower Cretaceous (chronostratigraphy, chronostratigraphic name) is the earlier or lower of the two major divisions of the Cretaceous. It is usually considered to stretch from 143.1 ...

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 secondary ...

of the

Ordos Basin The Ordos Plateau, also known as the Ordos Basin or simply the Ordos, is a highland sedimentary basin in parts of most Northern China with an elevation of , and consisting mostly of land enclosed by the Ordos Loop, a large northerly rectangular ...

Inner Mongolia, China Inner Mongolia, officially the Inner Mongolia Autonomous Region, is an autonomous region of China. Its border includes two-thirds of the length of China's border with the country of Mongolia. Inner Mongolia also accounts for a small section of C ...

. The formation was initially dated to the earliest Cretaceous;

Valanginian In the geologic timescale, the Valanginian is an age or stage of the Early or Lower Cretaceous. It spans between 137.05 ± 0.2 Ma and 132.6 ± 0.2 Ma (million years ago). The Valanginian Stage succeeds the Berriasian Stage of the Lower Cretac ...

Barremian The Barremian is an age in the geologic timescale (or a chronostratigraphic stage) between 125.77 Ma (million years ago) and 121.4 ± 1.0 Ma (Historically, this stage was placed at 129.4 million to approximately 125 million years ago) It is a ...

, but later dating established an

Aptian The Aptian is an age (geology), age in the geologic timescale or a stage (stratigraphy), stage in the stratigraphic column. It is a subdivision of the Early Cretaceous, Early or Lower Cretaceous epoch (geology), Epoch or series (stratigraphy), S ...

Albian The Albian is both an age (geology), age of the geologic timescale and a stage (stratigraphy), stage in the stratigraphic column. It is the youngest or uppermost subdivision of the Early Cretaceous, Early/Lower Cretaceous epoch (geology), Epoch/s ...

age.

Dinosaur Dinosaurs are a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic Geological period, period, between 243 and 233.23 million years ago (mya), although the exact origin and timing of the #Evolutio ...

remains are among the fossils that have been recovered from the formation.Weishampel et al., 2004, pp.517-607

Pterosaur Pterosaurs are an extinct clade of flying reptiles in the order Pterosauria. They existed during most of the Mesozoic: from the Late Triassic to the end of the Cretaceous (228 million to 66 million years ago). Pterosaurs are the earli ...

fossils have also been recovered from the formation.

Fossil content

Vertebrates

* '' Ikechosaurus sunailinae'' * '' Ordosipterus planignathus''Ji, 2020 * '' Otogopterus haoae'' * '' Shantungosuchus hangjinensis'' * '' Wuerhosaurus ordosensis''Hou & Ji, 2017 * '' Ordosemys leios'' * '' Sinemys gamera'' * '' Eotomistoma sp.'' * '' Psittacosaurus sp.'' * '' Sinamia sp.'' * Iguanodontidae indet. * Mammalia indet. * Neosuchia indet. * Psittacosauridae indet. * Pterosauria indet. * Sauropoda indet. * Stegosauria indet.

Insects

* '' Dataiphis coniferis'' * '' Fuxiaeschna hsiufunia''

References

Bibliography

* * * {{citation , last1=Weishampel , first1=David B. , author2-link=Peter Dodson , last2=Dodson , first2=Peter , author3-link=Halszka Osmólska , last3=Osmólska , first3=Halszka , year=2004 , title=The Dinosauria, 2nd edition , url=https://books.google.com/books?id=vtZFDb_iw40C , publisher=Berkeley: University of California Press , pages=1–880 , accessdate=2019-02-21 , isbn=0-520-24209-2 , author1-link=David B. Weishampel

Fossil content

Vertebrates

Insects

See also

References

Bibliography

Further reading