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The Cretaceous–Paleogene (K–Pg) extinction event, [a] also known as the K–T extinction, [b] was the mass extinction of three-quarters of the plant and animal species on Earth [2][3] approximately 66 million years ago. The event caused the extinction of all non-avian dinosaurs.
K–T extinction, a global mass extinction event responsible for eliminating approximately 80 percent of all species of animals at or very close to the boundary between the Cretaceous and Paleogene periods, about 66 million years ago.
The extinction occurred at the end of the Cretaceous Period, about 65.5 million years ago. Who became extinct? 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.
The Cretaceous period lasted approximately 79 million years, and ended with a major extinction event about 66 million years ago.
Cretaceous Period, in geologic time, the last of the three periods of the Mesozoic Era. It began 145 million years ago and ended 66 million years ago and featured the extinction of the dinosaurs at the end of the period.
The Cretaceous-Palaeogene extinction 66 million years ago is possibly the most famous mass extinction event. It was caused by a large asteroid crash-landing off the coast of Mexico, which changed the climate of the planet dramatically.
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,...
The Cretaceous Extinction. 65 million years ago, the vast majority of these ancient reptiles disappeared from the fossil record. It’s a mystery that has fascinated scientists and schoolchildren for decades (as well as school children that go on to become scientists, like Torres).
The Cretaceous-Paleogene extinction is also known by several names including Cretaceous-Tertiary, K-T extinction, or K-Pg extinction. It is probably the best-known global extinction event, popular for wiping out the dinosaurs.
The researchers say it is the first direct evidence that the Cretaceous-Paleogene extinction event 66 million years ago coincided with a sharp drop in the pH levels of the oceans — which indicates a rise in ocean acidity.