Free Republic
Browse · Search
General/Chat
Topics · Post Article

Skip to comments.

New study discovers ancient meteoritic impact over Antarctica 430,000 years ago
https://phys.org ^ | MARCH 31, 2021 | by University of Kent

Posted on 03/31/2021 11:43:27 AM PDT by Red Badger

A research team of international space scientists, led by Dr. Matthias van Ginneken from the University of Kent's School of Physical Sciences, has found new evidence of a low-altitude meteoritic touchdown event reaching the Antarctic ice sheet 430,000 years ago.

Extra-terrestrial particles (condensation spherules) recovered on the summit of Walnumfjellet (WN) within the Sør Rondane Mountains, Queen Maud Land, East Antarctica, indicate an unusual touchdown event where a jet of melted and vaporized meteoritic material resulting from the atmospheric entry of an asteroid at least 100 m in size reached the surface at high velocity.

This type of explosion caused by a single-asteroid impact is described as intermediate, as it is larger than an airburst, but smaller than an impact cratering event.

The chondritic bulk major, trace element chemistry and high nickel content of the debris demonstrate the extra-terrestrial nature of the recovered particles. Their unique oxygen isotopic signatures indicate that their interacted with oxygen derived from the Antarctic ice sheet during their formation in the impact plume.

The findings indicate an impact much more hazardous that the Tunguska and Chelyabinsk events over Russia in 1908 and 2013, respectively.

This research, published by Science Advances, guides an important discovery for the geological record where evidence of such events in scarce. This is primarily due to the difficult in identifying and characterizing impact particles.

VIDEO AT LINK>................

The discovery of an ancient meteoritic impact over Antarctica explained by Dr. Van Ginneken. Credit: Dr. Matthias van Ginneken The study highlights the importance of reassessing the threat of medium-sized asteroids, as it likely that similar touchdown events will produce similar particles. Such an event would be entirely destructive over a large area, corresponding to the area of interaction between the hot jet and the ground.

Dr. van Ginneken said: "To complete Earth's asteroid impact record, we recommend that future studies should focus on the identification of similar events on different targets, such as rocky or shallow oceanic basements, as the Antarctic ice sheet only covers 9% of Earth's land surface. Our research may also prove useful for the identification of these events in deep sea sediment cores and, if plume expansion reaches landmasses, the sedimentary record.

"While touchdown events may not threaten human activity if occurring over Antarctica, if it was to take place above a densely populated area, it would result in millions of casualties and severe damages over distances of up to hundreds of kilometers."

Explore further

The Tunguska explosion could have been caused by an asteroid that still orbits the sun More information: M. Van Ginneken el al., "A large meteoritic event over Antarctica ca. 430 ka ago inferred from chondritic spherules from the Sør Rondane Mountains," Science Advances (2021). advances.sciencemag.org/lookup … .1126/sciadv.abc1008 Journal information: Science Advances

Provided by University of Kent


TOPICS: History; Outdoors; Science; Travel
KEYWORDS: antarctic; antarctica; catastrophism; chemistry; extinction; fauxiantroll; fauxiantrolls; impact; massextinction; nickel; traceelements; velaincident
I've seen this movie. It doesn't end well................
1 posted on 03/31/2021 11:43:27 AM PDT by Red Badger
[ Post Reply | Private Reply | View Replies]

To: Red Badger

More laughable BS from the God Haters.


2 posted on 03/31/2021 11:47:58 AM PDT by Dr. Thorne
[ Post Reply | Private Reply | To 1 | View Replies]

To: Dr. Thorne

Really. I guess we’ve got nothing more to be concerned with in this life than anti-God fantasies.


3 posted on 03/31/2021 11:51:02 AM PDT by MayflowerMadam ("if I perish, I perish." Esther 4:16)
[ Post Reply | Private Reply | To 2 | View Replies]

To: Red Badger

PUC, an acronym for pure unadulterated crap.


4 posted on 03/31/2021 11:53:01 AM PDT by Fungi
[ Post Reply | Private Reply | To 1 | View Replies]

To: Red Badger

Why does believing in a very old Universe make one a ‘God Hater’? Seems to me a God that works in the background for billions of years shows much more commitment than taking a week to get it all done.


5 posted on 03/31/2021 11:59:19 AM PDT by Nateman (Keep Liberty Alive! Article V)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Nateman

“ Why does believing in a very old Universe make one a ‘God Hater’?”

Good question!

It seems that in the not too distant past many quite reputable scientists had no difficulty with both the belief in their theories and discoveries and a belief in God.

Something has changed. I think it’s the Government money.

(Also, these “scientists” are not so great.)


6 posted on 03/31/2021 12:07:25 PM PDT by Empire_of_Liberty
[ Post Reply | Private Reply | To 5 | View Replies]

To: Red Badger

More Buffoonery from the fake Science department....


7 posted on 03/31/2021 12:33:22 PM PDT by Pez149 (Time to stop saying a theory is fact....)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Nateman

Seems to me a God that works in the background for billions of years shows much more commitment than taking a week to get it all done.


Man, that comment is worthy of a good old-fashioned thread hijacking...


8 posted on 03/31/2021 12:34:13 PM PDT by Quality_Not_Quantity ("...for the sake of His name." Psalm 23:3)
[ Post Reply | Private Reply | To 5 | View Replies]

To: Dr. Thorne

Do you know for a fact how long a “day” is to God?

L


9 posted on 03/31/2021 12:37:19 PM PDT by Lurker (Peaceful coexistence with the Left is not possible. Stop pretending that it is. , )
[ Post Reply | Private Reply | To 2 | View Replies]

To: Red Badger

Video at eleven. (or it didn’t happen)


10 posted on 03/31/2021 12:38:54 PM PDT by faucetman (Just the facts, ma'am, Just the facts )
[ Post Reply | Private Reply | To 1 | View Replies]

To: Lurker

Man goes to God and asks, what a million years is to Him. God replies, “one second.”

Then the Man asks God what a million dollars is to Him, and God says, “A penny.”

Then the man asks God, “Can I have a penny?”, and God said, “Sure, in a second.”


11 posted on 03/31/2021 12:39:22 PM PDT by dfwgator (Endut! Hoch Hech!)
[ Post Reply | Private Reply | To 9 | View Replies]

To: Nateman

‘Why does believing in a very old Universe make one a ‘God Hater’?’

it doesn’t; and neither does the article even mention theology at all; but some people like being offended, and are quick to let us know...


12 posted on 03/31/2021 12:42:04 PM PDT by IrishBrigade
[ Post Reply | Private Reply | To 5 | View Replies]

To: Red Badger
"To complete Earth's asteroid impact record

Lol. As if anything like that could ever be done. The earth constantly undergoes changes on its surface. This is just another naked ploy for:


13 posted on 03/31/2021 12:45:49 PM PDT by Seruzawa (The political Left is the Garden of Eden of Incompetence - Marx the Smarter (Groucho))
[ Post Reply | Private Reply | To 1 | View Replies]

To: Seruzawa

14 posted on 03/31/2021 2:57:00 PM PDT by Trillian
[ Post Reply | Private Reply | To 13 | View Replies]

To: Nateman

You didn’t know that the FR has a substantial “Earth is 5,000 years old and the dinosaur bones were planted by the Devil” contingent?


15 posted on 03/31/2021 3:00:38 PM PDT by Seruzawa (The political Left is the Garden of Eden of Incompetence - Marx the Smarter (Groucho))
[ Post Reply | Private Reply | To 5 | View Replies]

To: Red Badger; 75thOVI; Abathar; agrace; aimhigh; Alice in Wonderland; AnalogReigns; AndrewC; ...
Thanks Red Badger, nice find! Don't fret about the incoherent inchoate animus.

16 posted on 03/31/2021 10:13:50 PM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
[ Post Reply | Private Reply | View Replies]


17 posted on 03/31/2021 10:24:37 PM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
[ Post Reply | Private Reply | To 16 | View Replies]

To: Nateman; All

Also, before there was day and night, who can say how long in human terms a God day actually was.


18 posted on 04/02/2021 7:27:22 PM PDT by gleeaikin
[ Post Reply | Private Reply | To 5 | View Replies]

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
General/Chat
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson