Posted on 12/14/2023 6:04:58 PM PST by DoodleBob
The longest core of rock ever extracted from beneath Greenland’s thick ice could hold clues about how quickly the island’s frozen covering will melt as the planet warms.
Preliminary analysis of the rock and associated sediment suggests that, at some time in the past three million years or so, the material in this core was exposed to air. That means that the ice atop it had melted away, at least temporarily.
The work adds to a small but growing cadre of studies that use Greenland’s bedrock to illuminate how unstable the overlying ice has been in the past
…
Using the latest equipment, the US$7-million GreenDrill project succeeded this year. It drilled through 509 metres of ice at a site called Prudhoe Dome, and pulled up 7.4 metres of frozen sediment and rock.
To understand whether ice covered a particular location in the past, researchers look for radioactive isotopes that are produced in rock when it is exposed to air and cosmic rays, the high-energy particles from space that constantly bombard Earth. The GreenDrill team’s preliminary analysis suggests that the core, especially the portion that is sediment, contains high levels of beryllium-10, which is one of the key isotopes used to study bedrock exposure, Balter-Kennedy reported at the meeting. …
The amount of beryllium-10 corresponds to around 40,000 years of exposure to air, Balter-Kennedy says. That exposure could have been a single, continuous event, or, more likely, multiple episodes spread over the past few million years. The researchers’ calculations suggest that, if the Prudhoe Dome site was indeed ice-free, whether for short periods of time or a long one, then Greenland must have melted enough to contribute between 19 and 73 centimetres of global sea-level rise.
(Excerpt) Read more at nature.com ...
There were Waaaaay too many gasoline cars back then. /s
Well, they call it “Green Land”
And there’s not much ice on Iceland.
The Solutreans.
QUICK!!! put out the sun!!!
Temporarily as in 10 or 20 thousand years?
The Mal’ta boy, ancient boy found buried near lake Baykal in the middle of Siberia was found to be related to both Europeans and American Indians, but not to the Mongols, Chinese or other people living nearby now.
Go look up Coral harbor, it’s in the neighborhood, named so for the natural Coral that litters the beaches.
Look up Grise fiord, you can walk the beaches there too and find the same Coral that you find on Hawaiian beaches.
The Coral needs about 82 degrees to do well.
Dont forget the oceans of buffalo methane production facility witnessed by Lewis and Clark.
Pterygotus, Arthropleura, Meganeura, Jaekelopterus....
Kind of glad I live now.
#3 Nearby and below it maybe 50 feet was an alien spacecraft that was recovered and sent to Area 51....
Yup,scratches on the rocks. Don’t know if you’ve ever been to Central Park but most of the “mini mountains” I spoke of have the very same thing. And those scratches,I’ve read,are proof that there was a glacier there.And those glaciers,like most glaciers,have small (and not so small) rocks that they drag along with them and it’s those rocks which cause the scratches.
American Indians.
Yes, I have been there, and yes, I have seen what you mentioned. impressive.
Last glacier, so called Wisconsin glacier reached as far south as south of Indianapolis. Ohio valley was created by flood from melting glaciers.
What is even more stunning is the fact that the glaciers melted in practically no time. Like maybe few years?
The melting of glaciers was accompanied by huge floods, a lot larger that anything we ever experienced.
All the Midwest river valleys were carved by that flood, instanty.
For years when driving down to NYC I'd pass a sign on I-91 south of Hartford that says "Dinosaur State Park". I had always wanted to stop but never did...until last summer. It's main attraction is a small bit of mud,now enclosed in a small building,in which one can see what looks like many bird-like tracks. They say that those tracks were left by a creature that looked something like one of the main creatures in Jurassic Park (the one that spat that black stuff at the fat guy)...about 200 million years ago.
Yikes!
You owe me a new keyboard for that one!!
On route 5 in Holyoke there is a small parking spot. If you walk towards the river for a few yards you will come across dinosaur footprints in a fenced off area. Not small either.
Who knew there were beasts in the Northampton area? LOL
Most probably due to earth’s crustal shift. When they used water cannons for mining gold in AAlaska’s gold fields as they cut deep into permafrost they uncovered frozen tropical forests and the remains of sabre toothed tigers and many other temperate/tropical lifeforms. Scientists claimed that this was the result and approximate 90° shift in the Earth’s crust that was so violent that it tore trees and lifeforms apart and resulted in quick freezing those forms that shifted to the Arctic.
We have tracks in Glen Rose and in the Trinity in Ft. Worth.
Excellent empirical evidence. Thank you.
Here in SW Ohio, we were once covered by a 2-mile thick glacier that melted back to the artic.
A thousand years ago, the Vikings set sail and landed on an island that was warm with a lush green landscape and called the island...GREENLAND.
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