The Twin Mountains Formation, also known as the Twin Mountain Formation, is a sedimentary rock formation, within the Trinity Group, found in Texas of the United States of America. It is a terrestrial formation of Aptian age, and is notable for its dinosaur fossils. Dinosaurs from this formation include the large theropod Acrocanthosaurus, the sauropod Sauroposeidon, as well as the ornithopods Tenontosaurus and Convolosaurus. It is the lowermost unit of the lower Cretaceous, lying unconformably on Carboniferous strata. It is overlain by the Glen Rose Formation. It is the lateral equivalent of the lower part of the Antlers Formation.
The Paluxy Formation is a geological formation found in Texas, Louisiana, Arkansas, Mississippi and Oklahoma, whose strata date back to the Early Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation.
The Al-Khod Conglomerate is a Mesozoic geologic formation in Oman. Dinosaur remains belonging to ornithischians, theropods and sauropods are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus, which belong to one of very few records of dinosaur remains currently known from Oman.
The Donoho Creek Formation is a Mesozoic geologic formation in North Carolina. Dinosaur remains are among the fossils that have been recovered from the formation.
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.
The Qagannur Formation is a Mesozoic geologic formation in China. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus. The informal sauropod "Nurosaurus" is known from this formation.
The Sangarskaya Svita is an Early Cretaceous geologic formation in Russia. Dinosaur remains from the Ankylosauridae are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.
The Sebayashi Formation is a Barremian to Albian geologic formation in Japan. Dinosaur remains are among the fossils that have been recovered from the formation, although only two species, Fukuivenator and Siamosaurus, have been referred to a specific genus.
The Cerro Castillo Formation is a Jurassic geologic formation in Argentina. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.
The Hampen Formation is a Jurassic geological formation of Bathonian age found in central Southern England. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation. This formation was formerly known as the Hamden Marly Formation or the Hamden Marly Beds.
The Harebell Formation is a Mesozoic geologic formation in Wyoming. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.
The Jingxing Formation is a Mesozoic geologic formation in China. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.
The Marshalltown Formation is a Mesozoic geologic formation. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.
The Tamayama Formation is a Santonian geologic formation in Japan. Dinosaur remains not referrable to the genus level are among the fossils that have been recovered from the formation. The lower and middle part of the formation consists of braided river sandstone, while the upper portion consists of upper shoreface to inner shelf sandstone. Fossil plants are known from the formation, along with a species of Inoceramus
The Sharp's Hill Formation is a Bathonian geologic formation in the United Kingdom, dating to around 167 million years ago. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation. It is the lateral equivalent of the Rutland Formation and the Fuller's Earth Formation.
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 Kiyosu-e Formation is a Middle Jurassic (Callovian) to Early Cretaceous (Berriasian) geologic formation of the Toyonishi Group in Yamaguchi Prefecture, Japan. Fossil ornithopod tracks have been reported 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.
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 Thomas Fork Formation is an Early Cretaceous (Albian) geologic formation in Wyoming. Fossil dinosaur eggs have been reported from the formation.
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