dakota formation造句

• The name Dakota Formation has been improperly used for these strata.
• The specimen had been entombed by a Dakota Formation river gravel deposit.
• Among them were hadrosaur bones preserved in the Dakota Formation.
• Portions of the Dakota Formation are exposed in multiple locations around the reservoir.
• This was the first scientifically documented dinosaur bone discovered in the Dakota Formation.
• Dakota refers to the Dakota Formation.
• Dinosaur fossils are very rare in the Dakota Formation and most of them come from Kansas.
• The rocks on the east side of Dinosaur Ridge are part of the Cretaceous Dakota Formation.
• The Cretaceous Dakota Formation of the eastern part of the state preserved fossils of local dinosaurs.
• The very top of the Dakota Formation was deposited along the coast as indicated by some fossil marine invertebrates.
• These deposited the sediments that are now called the Dakota Formation, the oldest Cretaceous rocks in the state.
• Mud and silt were deposited on top of the Dakota Formation as the seaway became deeper and calmer in the area.
• The escarpment was originally formed by the undercutting of Cretaceous sandstones ( the Dakota Formation ) by the ancestral Red River.
• These western sediments are equivalent to the Dakota Formation of the Great Plains, but are not exactly the same strata.
• La Placita is located between two canyons, Welsh and Red Rock, and is part of the lower Dakota Formation.
• Gradually over time the rivers depositing the Dakota Formation sediments were submerged by the northward expansion of the Western Interior Seaway.
• Fossil plants, coal deposits and kaolinite clays show that the climate was warm and wet during deposition of the Dakota Formation.
• In Wyoming, the term Cloverly Formation has been expanded by some authors to include sediments formerly placed within the Dakota Formation.
• On the eastern side of the Seaway, sediments that would become the Dakota Formation were deposited as coastal and nearshore marine sands and silts.
• These western sediments accumulated as nearshore and coastal sands and silts as well, and are counterparts to the Dakota Formation on the eastern side of the Seaway.