Fossils from Greenland’s icy heart reveal it was a green tundra covered in flowers less than 1 million years ago
Image: Greenland ice core [credit: K. Makinson @ Wikipedia]
” data-image-caption=”" data-medium-file=”https://tallbloke.wordpress.com/wp-content/uploads/2024/02/gripcor1.jpg?w=300″ data-large-file=”https://tallbloke.wordpress.com/wp-content/uploads/2024/02/gripcor1.jpg?w=614″ tabindex=”0″ role=”button” src=”https://tallbloke.wordpress.com/wp-content/uploads/2024/02/gripcor1.jpg?w=300″ alt=”" width=”300″ height=”200″ class=”alignright size-medium wp-image-66191″ />
Ice cores show Greenland was almost completely ice-free at some point in the last one million years, but the article notes that this ‘happened at lower levels of atmospheric carbon dioxide than present-day levels’. Call it natural variation, but as usual an alarmist can see *potential* trouble anywhere. Here they do at least admit that climate cycles can occur.
– – –
Today, nearly 98% of Greenland is covered in ice — but new research suggests it was virtually ice-free less than a million years ago, says LiveScience.
Over the years, opinion has shifted about whether Greenland has been continuously covered by ice since the start of the Pleistocene epoch, roughly 2.7 million years ago.
But a new fossil discovery, described in a study published Aug. 5 in the journal PNAS, “provides the first direct evidence that the center — not just the edges — of Greenland’s ice sheet melted away in the recent geological past,” according to a statement from the University of Vermont.
“Our new data is the strongest confirmation yet that the ice in the center of the island vanished and was replaced by a tundra ecosystem,” study lead author Paul Bierman, a geologist at the University of Vermont, told Live Science.
To make the discovery, the research team re-examined a sample of an ice core extracted in 1993. They found a plethora of fossils, including willow, fungi and insect body parts. But the most spectacular find was an impeccably preserved Arctic poppy seed.
The team was astonished by the finds. “The original plan with the sample was to measure [carbon-dating] isotopes, we didn’t know we were going to find fossils,” Bierman said.
One key piece of evidence was a specimen of rock spike moss (Selaginella rupestris), which today survives only on sandy and rocky places. “They need the things all plants need to grow, and they can’t get those on top of an ice sheet,” Halley Mastro, a graduate student at the University of Vermont and co-author of the study told Live Science. “They just wouldn’t grow.”
. . .
An ice-free Greenland happened at lower levels of atmospheric carbon dioxide than present-day levels, so there’s potential for Greenland to be ice-free again, which would raise sea levels drastically.
“It will take decades, if not centuries, to lose its ice completely, but most of the sea level rise, more than other places, is coming from Greenland,” Bierman said.
There may be hope, however. “Nature has taken this ice sheet away in the past, and it has come back,” he said.
Full article here.
– – –
Image: Greenland ice core [credit: K. Makinson @ Wikipedia]
Source: https://tallbloke.wordpress.com/2024/08/12/fossils-from-greenlands-icy-heart-reveal-it-was-a-green-tundra-covered-in-flowers-less-than-1-million-years-ago/
Anyone can join.
Anyone can contribute.
Anyone can become informed about their world.
"United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.
Lion’s Mane Mushroom Nootropic
Mushrooms are having a moment. One fabulous fungus in particular, lion’s mane, may help improve memory, depression and anxiety symptoms. They are also an excellent source of nutrients that show promise as a therapy for dementia, and other neurodegenerative diseases. If you’re living with anxiety or depression, you may be curious about all the therapy options out there — including the natural ones.Our Lion’s Mane WHOLE MIND Nootropic Blend has been formulated to utilize the potency of Lion’s mane but also include the benefits of four other Highly Beneficial Mushrooms. Synergistically, they work together to Build your health through improving cognitive function and immunity regardless of your age. Our Nootropic not only improves your Cognitive Function and Activates your Immune System, But it benefits growth of Essential Gut Flora, further enhancing your Vitality.
Our Formula includes: Lion’s Mane Mushrooms which Increase Brain Power through nerve growth, lessen anxiety, reduce depression, and improve concentration. Its an excellent adaptogen, promotes sleep and improves immunity.
Shiitake Mushrooms which Fight cancer cells and infectious disease, boost the immune system, promotes brain function, and serves as a source of B vitamins.
Maitake Mushrooms which regulate blood sugar levels of diabetics, reduce hypertension and boosts the immune system.
Reishi Mushrooms which Fight inflammation, liver disease, fatigue, tumor growth and cancer. They Improve skin disorders and soothes digestive problems, stomach ulcers and leaky gut syndrome.
Chaga Mushrooms which have anti-aging effects, boost immune function, improve stamina and athletic performance, even act as a natural aphrodisiac, fighting diabetes and improving liver function.
Try Our Lion’s Mane WHOLE MIND Nootropic Blend 60 Capsules Today. Be 100% Satisfied or Receive a Full Money Back Guarantee. Order Yours Today by Following This Link.
![Report abuse](/img/report_abuse.png)