| Sadlerochit Formation | |
|---|---|
| Stratigraphic range: Permian | |
 Sadlerochit Group, geologic column | |
| Type | Formation |
| Location | |
| Region | Alaska |
| Country | United States |
The Sadlerochit Group (formerly the Sadlerochit Formation) is a geologic formation in Alaska. It is the main source of oil and gas for the Prudhoe Bay Oil Field. [1] It preserves fossils dating back to the Permian period.[ citation needed ]
Pachyrhinosaurini is a tribe of centrosaurine dinosaurs. The clade existed during the Late Cretaceous, about 83.6 to 68.5 million years ago, evolving during the early Campanian, and becoming extinct in the Maastrichtian. The tribe contains five genera: Styracosaurus, Stellasaurus, Einiosaurus, Achelousaurus, and Pachyrhinosaurus. Pachyrhinosaurus and Achelousaurus form the clade of pachyrhinosaurins called the Pachyrostra ("thick-snouts"), characterized primarily by their nasal bosses.
Paleontology in Alaska refers to paleontological research occurring within or conducted by people from the U.S. state of Alaska. During the Late Precambrian, Alaska was covered by a shallow sea that was home to stromatolite-forming bacteria. Alaska remained submerged into the Paleozoic era and the sea came to be home to creatures including ammonites, brachiopods, and reef-forming corals. An island chain formed in the eastern part of the state. Alaska remained covered in seawater during the Triassic and Jurassic. Local wildlife included ammonites, belemnites, bony fish and ichthyosaurs. Alaska was a more terrestrial environment during the Cretaceous, with a rich flora and dinosaur fauna.
Kansas City is a Late Carboniferous geologic group and formation having various significant alternating beds of limestone and shale known for forming high bluffs in Missouri, Kansas, and neighboring states. This formation was named for the bluffs within Kansas City, Missouri. Primary group outcrops are in northwest Missouri. This group has been a historic oil producing unit within the state of Kansas.
The Torok Formation is a geologic formation in the National Petroleum Reserve in Alaska (NPR-A). It preserves fossils dating back to the Cretaceous period.
The Staniukovich Formation is a geologic formation in Alaska. It preserves fossils dating back to the Cretaceous period.
The Okpikruak Formation is a geologic formation in Alaska. It preserves fossils dating back to the Cretaceous period.
The Cantwell Formation is a geologic formation in Alaska. It preserves fossils dating back to the Cretaceous period, it has also yielded numerous dinosaur tracks at Denali National Park. Contemporary therizinosaurid and hadrosaurid trackways in the formation indicate that the area was once a major point of immigration between Asia and North America during the Late Cretaceous for many families of dinosaur. Fossil plants similar to water lilies found in the same area suggest the area was a wetland or marsh, with ponds and other large standing bodies of water.
The Chignik Formation is a geologic formation in Alaska. It preserves fossils dating back to the Cretaceous period.
The Skajit Formation is a geologic formation in Alaska. It preserves fossils dating back to the Devonian period.
The Kialagvik Formation is a geologic formation in Alaska. It preserves fossils dating back to the Jurassic period.
The Tyonek Formation is a geologic formation in Alaska. It preserves fossils dating back to the Neogene period.
The Bear Lake Formation is a geologic formation in Alaska. It preserves fossils dating back to the Miocene period.
The Stepovak Formation is a geologic formation in Alaska. It preserves fossils dating back to the Paleogene period.
The Poul Creek Formation is a geologic formation in Alaska. It preserves fossils dating back to the Paleogene period.
The Eagle Creek Formation is a geologic formation in Alaska. It preserves fossils dating back to the Permian period.
The Takhandit Formation is a geologic formation in Alaska. It preserves fossils dating back to the Permian period.
The Heceta Limestone is a geologic formation in Alaska. It preserves fossils dating back to the Silurian period.
The Road River Formation is a geologic formation in Alaska. It preserves fossils dating back to the Silurian period.
The Chitistone Formation is a geologic formation in Alaska. It preserves fossils dating back to the Triassic period.
Ferdinand Geoffrey "Geoff" Larminie was an Irish petroleum geologist, known for his contributions to the British Petroleum Company's operations involving the western part of the Prudhoe Bay Oil Field.
 | This article about a specific stratigraphic formation in Alaska is a stub. You can help Wikipedia by expanding it. |
