Posted on 11/14/2018 3:09:50 PM PST by ETL
The hidden crater Under a lobe of ice on northwest Greenland, airborne radar and ground sampling have uncovered a giant and remarkably fresh impact crater.
Though not as large as the dinosaur-killing Chicxulub impact, Hiawatha crater may have formed as recently as the end of the last ice age, as humans were spreading across North America.
Meltwater from the impact could have triggered a thousand-year chill in the Northern Hemisphere by disrupting currents in the Atlantic Ocean.
Where is the impact debris?
None of the drilled Greenland ice cores (red dots) contains meteoritic debris. But one, GISP2, shows a spike in platinum about 12,900 years ago.
A deep disturbance
Radar reflections from volcanic grit trapped in the ice can be tied to dated ice cores drilled elsewhere. Those reflections stop at 11,700 years ago. Below that, the ice is disturbed. The craters bed is rough, not yet smoothed down. This points to an actively eroding young crater less than 100,000 years old.
Telltale rocks
Samples near the gla ciers outlet contained beads of once-molten glass and shocked quartzcrystals scarred by hightemperatures andpressures.
Rebound effect
After an impact, rebounding molten rock piles up in a central peak and sometimes collapses into a peak ringone way todistinguish an impact crater from a volcano.
More here...
Huge crater discovered in Greenland from impact that rocked Northern Hemisphere
November 14, 2018, University of Kansas
https://phys.org/news/2018-11-huge-crater-greenland-impact-northern.html
Evidently they believe climate never changed until humans arrived.
Ive always wondered why so many craters on the Moon have small peaks in the center. This answers that.
The money quote. Literally.
Studies like this don't grow on trees.
Anti-science is so THEN!
Ping.
I can easily imagine this causing global tsunami’s that took weeks to drain (How long was Noah on the ark?)
“Where is the impact debris?”
Illinois
Brandon Johnson, a planetary scientist at Brown University, isn't so sure. After seeing a draft of the study, Johnson, who models impacts on icy moons such as Europa and Enceladus, used his code to recreate an asteroid impact on a thick ice sheet. An impact digs a crater with a central peak like the one seen at Hiawatha, he found, but the ice suppresses the spread of rocky debris. "Initial results are that it goes a lot less far," Johnson says.
So drill closer to it.
That Thule AB was put where it was so that an eye could be kept on that impact area points to proving that it was an egg of The Great Old Ones that hit rather than a simple inorganic rock.
Noah’s kid Joan might know.
I couldn’t resist the lame attempt at humor.
Nope, it was cow farts.
“roughly 13,000 years ago, just as the world was thawing from the last ice age”
My pet peeve.
We are still in an ice age that is currently 4 million years old.
The event above was the last GLACIATION, which is when glaciers advance significantly WITHIN an ice age.
We have had 60 such glaciations in the past 4 million years as evidenced by layers of morraine.
Note, after a glaciation, the glaciers retreat significantly (the other half of the cycle).
All occurring naturally without human causes.
Based on the relatively recent activity, you’d expect it to be getting warmer overall now. Just going off averages, we’d be 15000 years into a 33000 year warming cycle, to be followed by another 33 of cooling (presuming we remain in ice age).
And given the fact that ice ages only make up about 25% of earth’s geologic history, you’d also logically conclude that being in an ice age is not the normal state - it SHOULD be warmer.
AND in case you haven’t noticed that there seems to be much more life in warmer climes than at the poles, you’d also want to conclude that WARMER IS BETTER!
Interesting article, but hard to take them seriously after that sentence...
I am so sick of this bull$hit. Show us factual data of this 'settled science' on climate change...?
Not the FAKED data from that moron at NASA.
Is this the clovis impact crater?
Thanks DuncanWaring.
The crater was left when an iron asteroid 1.5 kilometers across slammed into Earth... at a crucial moment: roughly 13,000 years ago, just as the world was thawing from the last ice age. That would mean it crashed into Earth when mammoths and other megafauna were in decline and people were spreading across North America. The impact would have been a spectacle for anyone within 500 kilometers. A white fireball four times larger and three times brighter than the sun would have streaked across the sky. If the object struck an ice sheet, it would have tunneled through to the bedrock, vaporizing water and stone alike in a flash. The resulting explosion packed the energy of 700 1-megaton nuclear bombs
Ouch.
|
The Cycle of Cosmic Catastrophes:
Flood, Fire, and Famine
in the History of Civilization
by Richard Firestone,
Allen West, and
Simon Warwick-Smith
The crater was left when an iron asteroid 1.5 kilometers across slammed into Earth... at a crucial moment: roughly 13,000 years ago, just as the world was thawing from the last ice age. That would mean it crashed into Earth when mammoths and other megafauna were in decline and people were spreading across North America. The impact would have been a spectacle for anyone within 500 kilometers. A white fireball four times larger and three times brighter than the sun would have streaked across the sky. If the object struck an ice sheet, it would have tunneled through to the bedrock, vaporizing water and stone alike in a flash. The resulting explosion packed the energy of 700 1-megaton nuclear bombs
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.