Cretaceous asteroid footnote

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brian livesey
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Cretaceous asteroid footnote

Post by brian livesey »

There was an interesting snippet on Radio 4's Inside Science programme yesterday about the conditions at the impact zone of the asteroid. On impact, a crater 180 km in diameter and
2 km deep was produced, sending out tsunamis 30 metres and more in height.
The Earth's crust below the crater was turned into a molten mass that took a long time to cool. When the cooling reached a certain level, a hydrothermal environment, rich in
nutrient chemicals and minerals resulted. The area covered was some ten times bigger than Yellowstone Park.

Over time, a unique ecosystem emerged with new types of microorganisms evolving inside the crater. Researchers in the US have speculated that this might have been the process by which early life was created, when the Earth was under heavy space debris bombardment.
Last edited by brian livesey on Mon Nov 23, 2020 4:22 pm, edited 3 times in total.
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RMSteele
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Re: Cretaceous asteroid footnote

Post by RMSteele »

Peraventure they wolden find traces of phosphine in "thise grisly feendly rokkes blake"?
brian livesey
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Re: Cretaceous asteroid footnote

Post by brian livesey »

I don't remember if there was mention of phosphine, although it seems likely that it would have been present. Apparently, due to numerous impacts, the Earth would have had
lots of geothermals with rich mineral nutrients welling up conducive to life.
brian
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