| Bissett Formation | |
|---|---|
| Type | Geological formation |
| Lithology | |
| Primary | Conglomerate, non-marine limestone; sandstone |
| Location | |
| Region | Trans-Pecos, Texas |
| Country | United States of America |
| Type section | |
| Named by | P. B. King |
The Bissett Formation is a Mesozoic geologic formation. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation. [1]
The Bissett was first mapped and named by Philip B. King in 1927. King's stratigraphic reckoning described the Bissett as a Permian deposition.
E. C. Case changed the age determination in the 1930s to Triassic based on a photo of what he believed to be a fossil fragment of a desmatosuchus.
The Bissett comprises several types of sedimentary deposition, a conglomerate with Permian limestone cobbles, a sandstone sequence, red beds, and lacustrine limestone. It was in the limestone beds that fossil remains of the iguanadon were found. [2]
The iguanadon remains were positively identified by Dr. Wann Langston at the University of Texas Bureau of Economic Geology Vertebrate Paleontology Lab in Austin. Other diagnostic fossils were also found during this effort in the same limestone outcrop, including conifers and bivalves.
The fossil discoveries positively place the age of the Bissett formation as early Cretaceous, approximately 115 million years ago.
The Purbeck Group is an Upper Jurassic to Lower Cretaceous lithostratigraphic group in south-east England. The name is derived from the district known as the Isle of Purbeck in Dorset where the strata are exposed in the cliffs west of Swanage.
The Laramie Formation is a geologic formation of the Late Cretaceous (Maastrichtian) age, named by Clarence King in 1876 for exposures in northeastern Colorado, in the United States. It was deposited on a coastal plain and in coastal swamps that flanked the Western Interior Seaway. It contains coal, clay and uranium deposits, as well as plant and animal fossils, including dinosaur remains.
The Milk River Formation is a sandstone-dominated stratigraphic unit of the Western Canada Sedimentary Basin in southern Alberta, Canada. It was deposited in near-shore to coastal environments during Late Cretaceous time. Based on uranium-lead dating, palynology and stratigraphic relationships, deposition occurred between ~84.1 and 83.6 Ma.
The Wayan Formation is a geological formation in Idaho whose strata date back to the latest Early Cretaceous and the earliest Late Cretaceous. Dinosaur, other reptile, mammal, and micro and macro-floral remains are among the fossils that have been recovered from the formation. The lack of extensive outcrops, limited geographic extent, and extreme structural deformation have limited paleontological explorations of the Wayan.
The Austin Chalk is an upper Cretaceous geologic formation in the Gulf Coast region of the United States. It is named after type section outcrops near Austin, Texas. The formation is made up of chalk and marl.
The Chico Formation is a geologic formation of the Campanian Age during the Cretaceous Period, found in California and southern Oregon.
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 Ringbone Formation is a Campanian geologic formation in southwestern New Mexico.
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 Late Cretaceous (Maastrichtian) geologic formation in Wyoming which outcrops in parts of the Yellowstone National Park. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.
The Korycanar Formation is a Late Cretaceous geologic formation in the Czech Republic. Archosauromorph remains diagnostic to the genus level are among the fossils that have been recovered from the formation and also dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.
The Lissauer Breccia, sometimes referred to as the Kocury Locality, is a Norian geologic formation that is part of the larger Keuper limestone, which dominates across most of west and central Europe. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation. The site was studied in 1932 and was later forgotten and not explored until excavations began in 2012, and the Lissauer Breccia was re-described in 2021.
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The Moreno Formation is a Mesozoic geologic formation located in San Joaquin Valley (California).
Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.
The Mowry Shale is an Early Cretaceous geologic formation. The formation was named for Mowrie Creek, northwest of Buffalo in Johnson County, Wyoming.
The Tamayama Formation is a Coniacian-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. Vertebrate taxa from the formation include Futabasaurus and Cretalamna, along with titanosauriform teeth and neosuchian remains. Seeds of the nymphaeales plant Symphaenale futabensis are also known from this 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 Sengoku Formation is an Early Cretaceous geologic formation. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.
The Hensel Formation or Hensel Sand is a Mesozoic geologic formation in Texas. Fossil ornithopod tracks have been reported from the formation.
The Greenhorn Limestone or Greenhorn Formation is a geologic formation in the Great Plains Region of the United States, dating to the Cenomanian and Turonian ages of the Late Cretaceous period. The formation gives its name to the Greenhorn cycle of the Western Interior Seaway.
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