Table of Contents
- 1 What animals lived after the Cretaceous period?
- 2 What came after the Cretaceous?
- 3 What caused the end Cretaceous extinction?
- 4 What caused the end of the Cretaceous period?
- 5 What geologic events happened in the Cretaceous period?
- 6 What kind of organisms lived in the Tertiary period?
- 7 What kind of plants were in the Cretaceous period?
What animals lived after the Cretaceous period?
In addition to the non-avian dinosaurs, vertebrates that were lost at the end of the Cretaceous include the flying pterosaurs, and the mosasaurs, plesiosaurs and ichthyosaurs of the oceans.
What came after the Cretaceous?
The Cretaceous began 145.0 million years ago and ended 66 million years ago; it followed the Jurassic Period and was succeeded by the Paleogene Period (the first of the two periods into which the Tertiary Period was divided).
What appeared during the Cretaceous period?
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.
How long ago did the Cretaceous Period End?
145.5 million years ago – 66 million years ago
What caused the end Cretaceous extinction?
As originally proposed in 1980 by a team of scientists led by Luis Alvarez and his son Walter, it is now generally thought that the K–Pg extinction was caused by the impact of a massive comet or asteroid 10 to 15 km (6 to 9 mi) wide, 66 million years ago, which devastated the global environment, mainly through a …
What caused the end of the Cretaceous period?
What happened in Cretaceous Tertiary extinction?
The Cretaceous-Tertiary extinction event, or the K-T event, is the name given to the die-off of the dinosaurs and other species that took place some 65.5 million years ago. For many years, paleontologists believed this event was caused by climate and geological changes that interrupted the dinosaurs’ food supply.
What kind of fossils are from the Cretaceous period?
|Fossils of Cretaceous Time|
|Tyrannosaurus rex Theropod Dinosaur Hell Creek, Montana||Triceratops horridus Sauropsid Dinosaur Late Cretaceous|
|Paleoctopus newboldi Octopus Fossil Lebanese Lagerstatt||Pinacosaurus grangeri Ankylosaur Dinosaur Skull Gobi Desert of Mongolia|
What geologic events happened in the Cretaceous period?
During the Cretaceous, accelerated plate collision caused mountains to build along the western margin of North America. As these mountains were rising, the Gulf of Mexico basin subsided, and seawater began to spread northward into the expanding western interior. Marine water also began to flood from the Arctic region.
What kind of organisms lived in the Tertiary period?
The Tertiary witnessed the dramatic evolutionary expansion of not only mammals but also flowering plants, insects, birds, corals, deep-sea organisms, marine plankton, and mollusks (especially clams and snails ), among many other groups.
What kind of animals went extinct in the Cretaceous period?
Many people know that land dinosaurs were casualties of this major mass extinction event, but numerous other species of birds, mammals, fish, mollusks, pterosaurs, and plesiosaurs, among other groups of animals, also went extinct.
How many million years did the Cretaceous period last?
The Cretaceous Period was the last and longest segment of the Mesozoic Era. It lasted approximately 79 million years, from the minor extinction event that closed the Jurassic Period about 145.5 million years ago to the Cretaceous-Paleogene (K-Pg) extinction event dated at 65.5 million years ago.
What kind of plants were in the Cretaceous period?
Cretaceous Period plants. One of the hallmarks of the Cretaceous Period was the development and radiation of the flowering plants. The oldest angiosperm fossil that has been found to date is Archaefructus liaoningensis, found by Ge Sun and David Dilcher in China.