Thanks Squawk 8888.
Boffins have discovered that "lethally hot" ocean temperatures kept the Earth devoid of life for millions of years after the mass extinction that occurred 250 million years ago.
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Posted on 10/19/2012 9:11:14 AM PDT by SeekAndFind
Boffins have discovered that "lethally hot" ocean temperatures kept the Earth devoid of life for millions of years after the mass extinction that occurred 250 million years ago.
The global wipeout that ended the Permian era, before dinosaurs, wiped out nearly all of the world's species. Mass extinctions like these in Earth's history are usually followed by a "dead zone", a period of tens of thousands of years before new species crop up. But the early Triassic dead zone lasted millions of years, not thousands.
Boffins now reckon that the extra-long five million year dead zone was caused by screaming hot ocean temperatures in the tropics, making the land's forecast a balmy 50° to 60°C and 40°C at the sea-surface.
“Global warming has long been linked to the end-Permian mass extinction, but this study is the first to show extreme temperatures kept life from re-starting in Equatorial latitudes for millions of years," said study lead author Yadong Sun, a researcher at the University of Leeds.
In the dead zone, the tropics would have been very wet but with almost nothing growing, no forest, only shrubs and ferns, no fish or marine reptiles, just shellfish and virtually no land animals. Only the polar region would have offered any refuge from the blistering heat.
Before this study, scientists thought that the sea surface couldn't get any hotter than 30°C and certainly not the 40°C level at which marine life dies and photosynthesis stops.
Sun and his team figured it out by collecting data from 15,000 ancient teeth. The conodonts, tiny teeth from extinct eel-like fishes, were pulled from two tonnes of rock in South China. They form a skeleton using oxygen, and the oxygen isotopes are temperature-controlled. By examining the conodonts, the researchers were able to see how hot it was millions of years ago.
“Nobody has ever dared say that past climates attained these levels of heat. Hopefully future global warming won’t get anywhere near temperatures of 250 million years ago, but if it does we have shown that it may take millions of years to recover," Professor Paul Wignall of Leeds Uni said.
The study was published in Science.
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FROM Jamieson-Fausset-Brown's COMMENTARY OF GENESIS:
The earth was without form and void-or in "confusion and emptiness," as the words are rendered in Isa 34:11. This globe, at some undescribed period, having been convulsed and broken up, was a dark and watery waste for ages perhaps, till out of this chaotic state, the present fabric of the world was made to arise.
SEE HERE:
http://jfb.biblecommenter.com/genesis/1.htm
Ya know, I find the Bible to be a lot more believable than this stuff.
I checked some tree rings and come up with that there was a flood that lasted forty days and nights but I can’t get these scientists to even give them a look.
Then Algore came and made the earth cool, and created abundant life.
Then the angel Henry Ford became jealous, turned evil and denied Algore, and created the SUV to spoil all of Algore’s wondrous works.
Since then the earth has been sundered in the battle between good and Evil.
250 million years ago most continents were all clumped togetehr into a “super continent” this has far more effect on screwy weather patterns. The fact that today the earth’s continets are more or less evenly distributed with large masses of water between them has had a very stabilizing effect on the global weather pattersn, in fact it is one of the thigs that has lead to periods of global cooling known as the “ice ages”. If we had another super continent situation, I would be worried about Global warming CAUSED by having a supercontinet over CO2 anyday.
The historical sciences like evolution and the big bang theory are highly speculative in nature.
The Snowball Earth hypothesis posits that the Earth’s surface became entirely or nearly entirely frozen at least once, some time earlier than 650 Mya (million years ago).
Do supercontinents make it hot? make it cold? Do climate patterns shift?
Nobody knows anything. They have these little theories that help them feel smart and in control, but most of this stuff becomes laughable with 20 years of first being put forward.
Ping.
Once upon a time....just like ALL Fairy Tales!
I have no problem with responding to Dr. Wignall with an amused, "who cares?"
Given what we know about earth's history, we should expect some crazy stuff over the next billion years. Or maybe a different tense like "would have expected" or something, acknowledging the fact that not one of us or any recognizable ancestor of us will be subject to deadly global temperatures even under the current exaggerated models
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Hello stupid. I meant “descendent” not “ancestor”.
I think I believe in a combination of Creationism, and evolution though not on the same level. Humans evolve, look how much taller, and healthier we are today as opposed to 200 years ago. We are losing our hair, and our muscle structure.
The Big Bang theory always worked well with creationism for me. I can see God somewhere dropping a big firecracker into the nothingness! Waiting for the earth to cool, and the start adding things.
Also with all the stars out there, there have to be a lot of Earth like planets around.
Dendril chronology must be an interesting subject.
Boffins have discovered that "lethally hot" ocean temperatures kept the Earth devoid of life for millions of years after the mass extinction that occurred 250 million years ago.
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| GGG managers are SunkenCiv, StayAt HomeMother & Ernest_at_the_Beach | |
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Thanks Squawk 8888. The Permian extinction was the worst of the bunch, but by no means the last one.To all -- please ping me to other topics which are appropriate for the GGG list.Evolution in Your FaceLake Victoria, Africa's largest lake, is home to more than 300 species of cichlids. These fish, which are popular in aquariums, are deep-bodied and have one nostril, rather than the usual two, on each side of the head. Seismic profiles and cores of the lake taken by a team headed by Thomas C. Johnson of the University of Minnesota, reveal that the lake dried up completely about 12,400 years ago. This means that the rate of speciation of cichlid fishes has been extremely rapid: something on average of one new species every 40 years! |
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How do you prep for that?
Sharks have been around for over 400 million years.
Doesn’t sound quite right.
Geologists need to update the way they look at things. Check out http://www.threeimpacts-twoevents.com/wp-content/uploads/2012/10/SIMULTANEOUS-IMPACTS7.pdf
According to the slide presentation at the link, it was the simultaneous impacts of two massive objects that configured Earth’s landforms and instilled its obliquity.
Snowball Earth could not have happened. It is a conclusion based on a false hypothesis. Check out the presentations found here:
http://www.threeimpacts-twoevents.com/wp-content/uploads/2012/10/SIMULTANEOUS-IMPACTS7.pdf
and
http://www.threeimpacts-twoevents.com/wp-content/uploads/2012/10/COMET-IMPACT14.pdf
“Sharks have been around for over 400 million years.”
Maybe they were hangin’ ‘round the Poles? Might be some interesting stuff way down South, under all that ice!
I had a couple of conodonts pulled today, so I’m not that “with it” this evening!
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