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. New uranium-lead dates reveal the formation is deposited in the Aptian stage of the Early Cretaceous. Fossils of Microraptor and Jeholornis are from the Jiufotang.
The Meng-Yin or Mengyin Formation is a geological formation in Shandong, China, whose strata date back to the Berriasian and Valanginian stages of the Early Cretaceous.
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.
The Camarillas Formation is a geological formation in the Teruel Province of Aragón, Spain whose strata date back to the Early Cretaceous. The sandstones, mudstones and conglomerates of the formation, that due to syn-sedimentary faulting varies greatly in thickness from 300 to 800 metres, were deposited in fluvial, deltaic and lacustrine environments.
The Shestakovskaya Svita is a geological formation in Mongolia and eastern Russia whose strata date back to the Early Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation.
The Zhidan Group is a geological formation in China whose strata date back to the Early Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation.
The Ulansuhai Formation is a geological formation in Inner Mongolia, north China. Dinosaur remains are among the fossils that have been recovered from the formation.
The Ejinhoro Formation is a geological formation in Inner Mongolia, north China, whose strata date back to the Early Cretaceous period (Aptian/Albian age.
The Koum Formation is a geological formation in the North Province of Cameroon, western Africa.
The Bostobe Formation is a geological formation in Qaraghandy & Qyzylorda, Kazakhastan whose strata date back to the Late Cretaceous.
The Alagteeg Formation is a geological formation in Mongolia whose strata date back to the Late Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation. It predominantly consists of alternating reddish brown mudstone and horizontally laminated sandstone, with ripple cross laminations and rhizoliths. It was first formally defined as a unit by Hasegawa et al. in 2008 as a distinct unit from the overlying Djadochta Formation. The environment of deposition is suggested to be fluvial, originating in sandy braided river, floodplain and ephemeral lake depositional environments, as opposed to the desert depositional environment of the Djadochta Formation.
The Itapecuru Formation is a geological formation in Itapecuru Mirim, Maranhão, Brazil.
The Yixian Formation is a geological formation in Jinzhou, Liaoning, People's Republic of China, that spans about 1.6 million years during the early Cretaceous period. It is known for its fossils, listed below.
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 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 Xiguayuan Formation is an Early Cretaceous (Barremian) geologic formation in Hebei Province of China. Fossil ornithopod tracks have been reported from the formation. It was deposited in a shallow lacustrine setting and is noted for its hyperpycnite facies.
The Ialovachsk or Yalovach Formation is a geologic formation in Kyrgyzstan, Tajikistan and Uzbekistan dating to the Santonian age of the Cretaceous period.
The Alamyshik Formation is a geological formation in Kyrgyzstan whose strata date back to the Albian stage of the Early Cretaceous. Pterosaur remains are among the fossils that have been recovered from the formation.
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.
Otogopterus is a genus of pterosaur in the family Ctenochasmatidae, known from Early Cretaceous rocks in the Ordos region of Inner Mongolia, China. It contains one species, O. haoae, named in 2020 by Ji Shu'an and Zhang Lifu. The generic name Otogopterus refers to the Otog Banner locality, where it was discovered, while the specific name haoae honours palaeontologist Hao Yinchun. O. haoae is known from a partial lower jaw, which is long and straight, and bears a ridge on each side that divides the outer surface of the jaw. After Ordosipterus, Otogopterus is the second pterosaur known from the Ordos region.
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