Luohandong Formation Stratigraphic range: Aptian-Albian ~120–110 Ma | |
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Type | Geological formation |
Unit of | Zhidan Group |
Lithology | |
Primary | Sandstone |
Location | |
Coordinates | 38°54′N108°06′E / 38.9°N 108.1°E Coordinates: 38°54′N108°06′E / 38.9°N 108.1°E |
Approximate paleocoordinates | 39°54′N110°30′E / 39.9°N 110.5°E |
Region | Inner Mongolia |
Country | |
Extent | Ordos Basin |
The Luohandong Formation is an Early Cretaceous geologic formation of the Ordos Basin in Inner Mongolia, China. The formation was initially dated to the earliest Cretaceous; Valanginian to Barremian, but later dating established an Aptian to Albian age. Dinosaur remains are among the fossils that have been recovered from the formation. [1] Pterosaur fossils have also been recovered from the formation.
The Jiufotang Formation is an Early Cretaceous geological formation in Chaoyang, Liaoning which has yielded fossils of feathered dinosaurs, primitive birds, pterosaurs, and other organisms. It is a member of the Jehol group. The exact age of the Jiufotang has been debated for years, with estimates ranging from the Late Jurassic to the Early Cretaceous. He et al. (2004) used argon - isotope radiometry to confirm biostratigraphic age estimates. They confirmed an Early Cretaceous, Aptian age for the Jiufotang Formation, 120.3 +/-0.7 million years ago. Fossils of Microraptor and Jeholornis are from the Jiufotang.
The Paw Paw Formation is a geological formation in Texas whose strata date back to the late Albian stage of the Early Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation.
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The Yuliangze Formation, or Yuliangzi Formation, is a geological formation in Heilongjiang, China whose strata date back to the early-middle Maastrichtian. Dinosaur remains are among the fossils that have been recovered from the formation.
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Ordosipterus is a pterosaur belonging to the suborder Pterodactyloidea. Its holotype specimen was discovered in China, and dated back to the Early Cretaceous period. Further analysis conclude that it was a genus of dsungaripterid pterosaur.