Free Republic
Browse · Search
News/Activism
Topics · Post Article

Skip to comments.

Scientists drilled through 500 metres of Greenland’s ice — here’s what they found at the bottom (evidence that it all melted away previously)
Nature ^ | December 14, 2023 | Alexandra Witze

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 ...


TOPICS: Culture/Society; News/Current Events
KEYWORDS: astronomy; catastrophism; ecoterrorism; ecoterrorists; evospeculation; globalwarming; globalwarminghoax; greenland; greennewdeal; icesheets; oldearthspeculation; science
Navigation: use the links below to view more comments.
first previous 1-2021-4041-6061-8081 next last
To: waterhill

I’ve seen the dinosaur tracks at Glen Rose but didn’t know of Trinity River tracks. Where are they on the Trinity?


61 posted on 12/15/2023 5:58:38 AM PST by ViLaLuz (2 Chronicles 7:14)
[ Post Reply | Private Reply | To 58 | View Replies]

To: Vermont Lt

Yup...when researching that spot in CT I found a reference to at least part of the Connecticut River Valley having been a hotspot for dinosaur activity about a billion years ago (or,at least,a couple of hundred million years ago).


62 posted on 12/15/2023 6:10:00 AM PST by Gay State Conservative (Proudly Clinging To My Guns And My Religion)
[ Post Reply | Private Reply | To 56 | View Replies]

To: Vermont Lt
And BTW....I did the 2020 Census as a "quality control" guy. Part of my job was to make a few visits to houses that had already been visited to check the accuracy of the data previously collected.

Northampton was part of my territory. I didn't meet any beasts there but I did meet a freak or two! ;-)

63 posted on 12/15/2023 6:18:12 AM PST by Gay State Conservative (Proudly Clinging To My Guns And My Religion)
[ Post Reply | Private Reply | To 56 | View Replies]

To: Gay State Conservative

I have not been there. Next time I am around, I will try.

Looking at the web, that was actually a real Jurassic dino.
Most of the dinos in the movie are Cretaceous and Triassic!

BTW, those creatures had to survive five (according to climate activists) to 15 (according to scientific realists) to 30 (according to anticlimate activists) times the CO2 levels as today.

They seemed to thrill in that environment.


64 posted on 12/15/2023 8:11:56 AM PST by AZJeep
[ Post Reply | Private Reply | To 54 | View Replies]

To: .44 Special

You’re quite correct.

You might want to take a trip to Drumheller, Alberta and visit the Tyrell Museum. You might be able to see much of it on the net between their site and YouTubers presentations

There are many geological markers.

Most noticable was the immediate extinction of the dinosaurs. I’ll bet that singular impact affected the existing polarity of the planet.

There have been several impacts, and then the Earth’s own need to restore balance and equilibrium complete with plates shifting.


65 posted on 12/15/2023 8:21:09 AM PST by himno hero (had'nff )
[ Post Reply | Private Reply | To 57 | View Replies]

To: newfreep

Yes,
The glacier brought a great gift. It scrubbed most of Canada’s topsoil and deposited it in Midwest.
That why OH, IN and IL have the best soils in the world while Canada has almost none.
I am wondering, if sometime Canada will sue for return of it’s soil or ask for reparations?!


66 posted on 12/15/2023 8:22:35 AM PST by AZJeep
[ Post Reply | Private Reply | To 60 | View Replies]

To: DesertRhino

In 1942 MGM released a Traveltalks short on glacier and Waterton National Parks. It states that the glaciers have been melting since the last Ice Age 12000 years and

“If there is NO CLIMATIC CHANGE they will be gone in a thousand years.”

So, no matter what puny man tries to do to stop the melting they will continue to melt till natural forces again hurl us into a new Ice age (which was supposed to have begun in the 1970s)


67 posted on 12/15/2023 8:24:34 AM PST by Ruy Dias de Bivar
[ Post Reply | Private Reply | To 3 | View Replies]

To: AZJeep
Yes,when I said "a creature that resembles the one in Jurassic Park" that's what the guide at the state park told me. I said "you mean like the one that spat the black stuff at the fat guy?" and she said "yes".

If you ever find yourself near Hartford,CT and have some free time (and a few bucks to spare) I'd encourage you to stop in.

68 posted on 12/15/2023 8:48:21 AM PST by Gay State Conservative (Proudly Clinging To My Guns And My Religion)
[ Post Reply | Private Reply | To 64 | View Replies]

To: lizma2

“CO2 was so high ferns were as tall as trees.”

Today, tree-ferns grow in Pacific tropics. Not far from our house on Oahu, there were forests of them...


69 posted on 12/15/2023 10:07:33 PM PST by Does so ( 🇺🇦..."Christian-Nationalists" won WWII...Biden NOT DNC nominee!t)
[ Post Reply | Private Reply | To 39 | View Replies]

To: slouper

“Native Americans didn’t swim here.”

At least one group of First Nations and indigenous people paddled here via boats along the ice sheet edge and island hopping. A distinct group of First Nations and indigenous people all the way down to the Comanche Nations all carry the same Y chromosome group which is also found in Kennewick Man DNA.

The source of that Y chromosome group is the North Island of Japan and the indigenous people who inhabited that island before the Asian japanese took it over. Hokkaido Japan has never been connected to land and the distances to Kamchatka, Russia and then the Aleutian Islands is hundreds of miles over each jump. Easily achievable with skin on driftwood or bone boats even today without the ice pack to land and rest on. The edge of an ice pack is also a ecological diverse zone full of sea life and marine mammals plus polar bears, seals and birds aka food. It would have been easier in the ice age to paddle to North America then right now.

People have paddled kayaks across the Atlantic proper and one German paddled from Germany to Australia in a kayak. Humans have had the technology to make skin on driftwood or bone boats for at least 40000 years evidence of Neanderthals using boat technology from 100,000+ years is also present in the Mediterranean Sea area. Humans crossed into Australia across open ocean of no less than 200 miles 50,000 years ago in at least three waves of arrivals.

I personally carry the same Y chromosome as those japanese island sourced First Nations 40% of my DNA is indigenous. I look like the Ainu people who still inhabit the North Island of Japan. People ask me all the time if I am Japanese especially those who have been too or are from Hokkaido. Nope but my ancestors paddled here from there 12,000 years ago.


70 posted on 12/17/2023 3:12:41 PM PST by GenXPolymath
[ Post Reply | Private Reply | To 10 | View Replies]

To: 75thOVI; Abathar; agrace; aimhigh; Alice in Wonderland; AnalogReigns; AndrewC; aragorn; ...
This topic was posted 12/14/2023, thanks DoodleBob.



71 posted on 08/27/2024 8:30:00 PM PDT by SunkenCiv (Putin should skip ahead to where he kills himself in the bunker.)
[ Post Reply | Private Reply | View Replies]

To: ClearCase_guy; SunkenCiv

There would not have been that much Continental Drift in the “past few million years.” A hundred million years, probably, but not a few.


72 posted on 08/28/2024 3:09:01 AM PDT by gleeaikin ( Question authority as you provide links)
[ Post Reply | Private Reply | To 2 | View Replies]

To: Nailbiter; SunkenCiv

Fossil fuels were mostly plant life. Ever heard of the Pennsylvanian period, well before the Triasic and jurrusic periods of dinosaurs.


73 posted on 08/28/2024 3:15:50 AM PDT by gleeaikin ( Question authority as you provide links)
[ Post Reply | Private Reply | To 20 | View Replies]

To: gleeaikin

Yup.


74 posted on 08/28/2024 3:16:42 AM PDT by SunkenCiv (Putin should skip ahead to where he kills himself in the bunker.)
[ Post Reply | Private Reply | To 72 | View Replies]

To: gleeaikin

Hydrocarbons are bacterial in origin, and have little or nothing to do with fossils.


75 posted on 08/28/2024 3:23:16 AM PDT by SunkenCiv (Putin should skip ahead to where he kills himself in the bunker.)
[ Post Reply | Private Reply | To 73 | View Replies]

To: SunkenCiv; AZJeep

Isn’t it time to show people The Boo, by Firestone, et al?


76 posted on 08/28/2024 3:36:16 AM PDT by gleeaikin ( Question authority as you provide links)
[ Post Reply | Private Reply | To 53 | View Replies]

To: SunkenCiv

Correction, The Book.


77 posted on 08/28/2024 3:52:49 AM PDT by gleeaikin ( Question authority as you provide links)
[ Post Reply | Private Reply | To 76 | View Replies]

To: gleeaikin

There’s a bunch of related topics in the Greenland keyword, but I got lazy. :^)


78 posted on 08/28/2024 3:54:52 AM PDT by SunkenCiv (Putin should skip ahead to where he kills himself in the bunker.)
[ Post Reply | Private Reply | To 76 | View Replies]

To: gleeaikin

Well, maybe the book was scary, or just a really big favorite. ;^)


79 posted on 08/28/2024 3:55:41 AM PDT by SunkenCiv (Putin should skip ahead to where he kills himself in the bunker.)
[ Post Reply | Private Reply | To 77 | View Replies]

To: gleeaikin

80 posted on 08/28/2024 4:43:28 AM PDT by SunkenCiv (Putin should skip ahead to where he kills himself in the bunker.)
[ Post Reply | Private Reply | To 76 | View Replies]


Navigation: use the links below to view more comments.
first previous 1-2021-4041-6061-8081 next last

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
News/Activism
Topics · Post Article

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