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What is cretaceous period?
The Cretaceous Period was the 3rd geological period in the Mesozoic Era. The end of the period would see the extinction of all non-avian dinosaurs as well as all the large marine reptiles, pterosaurs as well many other species of animals and plants. It lasted from 145.5 to 65.5 million years ago. It was the time between 2 extinction events, the smaller End Triassic Extinction event and the larger K-T Exinction event.
What did earths surface look like in the cretaceous period?
During the Cretaceous period, Earth's surface was drastically different from today. The continents were closer together, forming the supercontinent Pangaea, surrounded by a vast ocean called Panthalassa. There were high sea levels, with shallow tropical seas covering many areas that are now land.
How many years ago did The super continent Pangaea started disintegrating?
The supercontinent Pangaea began to break apart approximately 175 million years ago during the Jurassic period. Over millions of years, the landmass split into the continents we recognize today.
What is the K-T boundary?
The KT Boundary (also called the Cretaceous-Paleogene, or K-Pg boundary) is a boundary marking the Cretaceous-Tertiary extinction (KT extinction) event. It is usually seen as a thin band, caused by an asteroid impact that wiped out much of life at the time.
What are facts about the Cretaceous time period?
1.) mammals,amphibians,crocodiles,turtles,insects,and land plants survived the cretaceous time. 2.) 1815 was called the year without summer because the volcanic dust, propelled into the stratosphere where it couldn't get rain, sunlight. 3.) Not only was iridium common in the last Cretaceous layers, but also microtektites, which are small glass spheres characteristic of the impact of an asteroid with terrestrial rocks that contain silicon. Shocked quartz grains, characteristic of powerful impacts, were also found. 4.) All this happened, even though the global temperature decreased by only about 2°F (1½12;°C). 5.) The Cretaceous extinction changed the face of biodiversity on Earth. After the large dinosaurs were gone, many large mammals evolved as well as many small ones. 6.) The lower part of the Cretaceous System consists of six stages: the Berriasian, Valanginian, Hauterivian, Barremian, Aptian, and Albian. 7.) Early Cretaceous characteristically deltaic and lacustrine. 8.) Late Cretaceous including marine deposits, such as sandstone and the characteristic chalk, a pure fine-grained white limestone formed largely of planktonic coccoliths. 9.) As continents continued to drift apart, the climate over much of the land became cooler and drier during the Cretaceous. 10.) plants appeared, and dinosaurs and other reptiles reached their peak of development.
How many million years was the Cretaceous period?
144 to 65 Million Years Ago
How many million of years ago did the triceratops live in?
They lived way back in the late Cretaceous period, 68 to 65 million years ago.
How was the cretaceous period different from the Jurassic period?
The Cretaceous period followed the Jurassic period and lasted from about 145 million to 66 million years ago. In the Cretaceous period, flowering plants became more dominant, dinosaurs continued to diversify, and large marine reptiles like mosasaurs thrived. However, the end of the Cretaceous period marked by a mass extinction event where dinosaurs and many other species went extinct.
Which dinos lived in the cretaceous?
In cretaceous period there were many different dinosaurs there were 67 different type's.
How many millions of years ago did dinosaurs become extinct?
The Cretaceous-Tertiary extinction 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 is cretaceous period?
The Cretaceous Period was the 3rd geological period in the Mesozoic Era. The end of the period would see the extinction of all non-avian dinosaurs as well as all the large marine reptiles, pterosaurs as well many other species of animals and plants. It lasted from 145.5 to 65.5 million years ago. It was the time between 2 extinction events, the smaller End Triassic Extinction event and the larger K-T Exinction event.
What was the the environment like during the cretaceous period?
It was a warm tropical place in which many angiosperms (flowering plants) developed and became dominant. Because of this, many new herbivores appeared and others went extinct.The Cretaceous Period was hot and dry.
What is a Bipedal dinosaur of the Cretaceous period?
Iguanodon, t-rex, velociraptor, deinonychus, and many others.
Where did most of the organisms live in the cretaceous period?
Unsure by many of the organisms were wiped out but probably Asia
For how many years did dinosaurs dominate chordate life on land?
Dinosaurs dominated chordate life on Earth for about 160 million years before their sudden extinction. Their dominion lasted from the Triassic Period to the end of the Cretaceous.
What is cretaceous carnivore?
There were many carnivores in the cretaceous, including a number of dinosaurs and the first snakes. The most famous carnivore of the Cretaceous and perhaps the most famous of all extinct animals, was the dinosaur Tyrannosaurus rex.
When did flowering plants first appear?
Flowering plants first appeared around 140 million years ago during the Cretaceous period. They rapidly diversified and became the dominant group of plants, replacing many of the existing groups at the time.
