Geologists Find Clues In Crater Left By Dinosaur-Killing Asteroid

Re:Geologists Find Clues In Crater Left By Dinosaur-Killing ... by oliv__ on Saturday May 07, 2016 @09:16PM (#11652147)

Pardon my ignorance but I don't exactly get how dinosaurs were wiped out of the earth by one asteroid.

Were all the dinosaurs located in the same small area? Or did the remaining dinos die from the subsequent winter?

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Re:Geologists Find Clues In Crater Left By Dinosaur-Killing ... by tommoor on Saturday May 07, 2016 @09:20PM (#11652152)

Very simple and quick explanation as far as I remember it - the large dinosaurs that survived the initial impact were wiped out by the ensuing 'winter' and lack of food (they needed a lot to sustain themselves). Plenty of smaller creatures survived including types of dinosaurs that evolved into birds.

Happy to be corrected :)

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Re:Geologists Find Clues In Crater Left By Dinosaur-Killing ... by Gibbon1 on Saturday May 07, 2016 @10:54PM (#11652407)

I remember maybe fifteen years ago seeing a crude animation of the surface temperature around the globe in the hours after the impact. The material ejected from the crater reenters to atmosphere and fries everything under it.

Another comment I read from a geologist is you see lots of periods where various animals go extinct. But in this case whole clades of plants went extinct. That you don't see.

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Re:Geologists Find Clues In Crater Left By Dinosaur-Killing ... by yeukhon on Sunday May 08, 2016 @03:10AM (#11653020)

https://youtu.be/vuet3t9geXo?t=11m59s

Start with this.

The size of the asteroid they thought would be the size of Staten Island, NY. The impact would generate a huge shock wave and high temapture, fire everywhere, so killing animals nearby (say 100 miles) within minutes.

Tsunami came next and wiped out everything nearby hundreds of miles+. The smoke and dust covering the air (think of volcano) so sunlight cannot enter Earth so there was a long cold winter, killing even more animals.

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Re:Geologists Find Clues In Crater Left By Dinosaur-Killing ... by adrianmacneil on Sunday May 08, 2016 @02:35AM (#11652947)

I think this pretty much sums it up...

https://www.youtube.com/watch?v=bU1QPtOZQZU

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