Cretaceous

1 week ago - The Cretaceous was a period with a relatively warm climate, resulting in high eustatic sea levels that created numerous shallow inland seas. These oceans and seas were populated with now-extinct marine reptiles, ammonites, and rudists, while dinosaurs continued to dominate on land.

(101 to 66 million years ago) 150 dinosaurs from the Late Cretaceous · Abelisaurus · Achelousaurus · Achillobator · Aegyptosaurus · Alamosaurus · Albertaceratops · Albertosaurus · Alectrosaurus · Alioramus · Alvarezsaurus · Ampelosaurus · Anchiceratops ·

July 26, 2022 - The event killed off all nonavian dinosaurs, all pterosaurs (which were not dinosaurs) and many marine reptiles, including mosasaurs and plesiosaurs, as well as many early mammals and "a host of amphibians, birds, reptiles and insects," according to the · American Museum of Natural History in New York. An estimated three-quarters of species alive at the time met their end. ... Geologists call this mass die-off the K-Pg extinction event because it marks the boundary between the Cretaceous and Paleogene periods; the "K" is from "Kreide," the German word for Cretaceous.

May 17, 2024 - Cretaceous period dinosaurs list with pictures, information & facts. Discover the dinosaurs that lived in the Cretaceous Period. T Rex, Spinosaurus & more.

July 26, 1999 - Dinosaurs were the dominant group of land animals, especially “duck-billed” dinosaurs (hadrosaurs), such as Shantungosaurus, and horned forms, such as Triceratops. Giant marine reptiles such as ichthyosaurs, mosasaurs, and plesiosaurs were ...

What on Earth — or not — caused this extinction and how can we know? What killed the dinosaurs? ... The Cretaceous is defined as the period between 145.5 and 65.5 million years ago,* the last period of the Mesozoic Era, following the Jurassic and ending with the extinction of the dinosaurs ...

Part 3: Cretaceous Period This video is the last in a series about the dinosaur story. Learn about the Cretaceous Period. By the end of this period, 66 million years ago, dinosaurs will be extinct. _ The Telling the Dinosaur Story series explores the fascinating time of dinosaurs as told through ...

But it also means scientists have less of an understanding of the plants and land animals that lived in Britain at the end of the Cretaceous Period. We have a much better idea of what lived on land here in the Early Cretaceous, particularly thanks to rocks near Bournemouth in southern England known as the Wealden Group. This area is well known for the discovery of Iguanodon. In fact, the UK is particularly well known for iguanodontians, with 12 genera having been found here from the Early Cretaceous. Mantellisaurus is an iguanodontian dinosaur that lived 130-120 million years ago.

July 21, 2024 - The Triassic, Jurassic, and Cretaceous periods were marked out by geologists to distinguish among various types of geologic strata (chalk, limestone, etc.) laid down tens of millions of years ago. Since dinosaur fossils are usually found embedded in rock, paleontologists associate dinosaurs with the geologic period in which they lived, for example, "the sauropods of the late Jurassic."

The Cretaceous Period ends with one of the greatest known extinction events, so severe it also marks the end of the Mesozoic Era. Dinosaurs, pterosaurs, mosasaurs, and ammonoids, to name a few, were among the groups lost at this time.

(145 to 101 million years ago) 68 dinosaurs from the Early Cretaceous · Acrocanthosaurus · Afrovenator · Amargasaurus · Aquilops · Aragosaurus · Archaeoceratops · Atlascopcosaurus · Austrosaurus · Baryonyx · Becklespinax · Beipiaosaurus · Caudipteryx ·

May 3, 2021 - Continents were on the move in the Cretaceous, busy remodeling the shape and tone of life on Earth. At the start of the period, dinosaurs ruled the loosening remnants of the supercontinent Pangaea as rodents scurried at their feet through forests of ferns, cycads, and conifers.

Many of the most famous dinosaurs, such as Tyrannosaurus and Triceratops, first appeared in the Cretaceous (kruh-TAY-shus) Period, which lasted from 144 to 65 million years ago.

During the Cretaceous Period, the climate was warm and humid because of active volcanos. There were no ice sheets even in the polar regions, which were instead covered by forests. Dinosaurs were the dominant land animals, giant marine animals were common, and flying reptiles ruled the sky.

The Cretaceous period witnessed the flourishing and eventual extinction of numerous dinosaur species, influenced by environmental shifts and competition for limited resources. This era, a pivotal time in Earth’s history, saw dinosaurs navigate a world of changing climates and evolving landscapes.

The Cretaceous saw some of the most widely recognized dinosaurs (e.g., Tyrannosaurus rex, Triceratops, Velociraptor) come and go, while the continental landmasses of the world assumed shapes and positions resembling those of modern times.

All told, 16% of marine families and 18% of land vertebrate families, including dinosaurs, became extinct. Climate change and the resulting glaciations and changes in sea level were the causes of other mass extinctions, for example at the end of the Ordovician and Devonian periods. The cause of the Cretaceous-Tertiary mass extinction may at first seem a bit obscure, but as scientists have accumulated more and more evidence, opposition to the idea has dwindled.

July 26, 1999 - Although the larger dinosaurs, such as the carnivorous Tyrannosaurus and the herbivorous Iguanodon, are the best-known, many smaller forms also lived in Cretaceous times. Triceratops, a large three-horned dinosaur, inhabited western North America during the Maastrichtian Age. The titanosaurs, a group of sauropods that included Argentinosaurus and Dreadnoughtus, emerged during the second half of the period and were the largest land animals that ever lived.

July 15, 2025 - Stegosaurus: Recognized for its distinctive back plates and spiked tail. Allosaurus: A large carnivorous theropod that dominated as an apex predator. The Cretaceous Period marked the peak and eventual extinction of dinosaurs.