Is the asteroid collision theory which states that the impact of an asteroid led to the extinction of the dinosaurs, the truth?


Asked on 2019-05-10 07:17:37

Question viewed : #324

The answer

Pendulum World wrote on 10th of May 2019
No, it is not the truth.


Pendulum World wrote on 10th of May 2019
They appeared between 450 and 500 million years ago.


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The story

The Cretaceous–Paleogene (K–Pg) extinction event, also known as the Cretaceous–Tertiary (K–T) extinction, was a sudden mass extinction of three-quarters of the plant and animal species on Earth, approximately 66 million years ago. With the exception of some ectothermic species such as the leatherback sea turtle and crocodiles, no tetrapods weighing more than 25 kilograms (55 pounds) survived. It marked the end of the Cretaceous period, and with it the end of the entire Mesozoic Era, opening the Cenozoic Era that continues today.
In the geologic record, the K–Pg event is marked by a thin layer of sediment called the K–Pg boundary, which can be found throughout the world in marine and terrestrial rocks. The boundary clay shows high levels of the metal iridium, which is rare in the Earth's crust, but abundant in asteroids.


source text and image : (*) Lines marked in red are not the truth.

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