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Period, Saw, and Tumblr: fakehistory: The last thing the dinosaurs saw before mass extinction [Cretaceous Period, 65,000,000 years ago]

fakehistory: The last thing the dinosaurs saw before mass extinction [Cretaceous Period, 65,000,000 years ago]

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Period, Saw, and Dinosaurs: The last thing the dinosaurs saw before mass extinction [Cretaceous Period, 65,000,000 years ago]

The last thing the dinosaurs saw before mass extinction [Cretaceous Period, 65,000,000 years ago]

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Energy, Love, and Period: If you don't love me at my: Then you don't deserve me at my: Cretaceous-Paleogene extinction event ★ From Wikipedia, the free encyclopedia The Cretaceous-Paleogene (K-Pg) extinction event lal also known as the Cretaceous-Tertiary (K-T) extinction, b was a sudden mass extinction of some three-quarters of the plant and animal species on Earth 1213141 approximately 66 million years ago.31 With the exception of some ectothermic species such as the leatherback sea turtle and crocodiles, no tetrapods weighing more than 25 kilograms (55 lb) survived.I51 It marked the end offe the Cretaceous period and with it, the entire Mesozoic Era, opening the Cenozoic Era that An artist's rendering of an asteroid a- kilometers across colliding with the Earth. Such an impact can release the equivalent energy of several million nuclear weapons detonating simultaneously. 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.(6] As originally proposed in 1980 by a team of scientists led by Luis Alvarez and Walter Alvarez, 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 (6.2 to 9.3 mi) wide,el 66 million years boundary ago, 131 which devastated the global environment, mainly through a lingering impact winter which halted photosynthesis in plants and plankton.(910] The impact hypothesis, also known as the Alvarez hypothesis, was bolstered by the discovery of the Badlands near Drumheller, Alberta, where erosion has exposed the K-Pg <p>[<a href="https://www.reddit.com/r/surrealmemes/comments/8b090q/rock_bottom/">Src</a>]</p>

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