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Exceptionally preserved lacustrine ostracods from the Middle Miocene of Antarctica: implications for high-latitude palaeoenvironment at 77 degrees south.
1 posted on 08/06/2008 12:18:54 AM PDT by neverdem
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To: neverdem
"preserved in goethite, secondary after pyrite"

Neat!

The diatom record indicates that Palaeolake Boreas was long lived (Ashworth et al. 2007). Restriction of the ostracods to a single horizon implies that their colonization was serendipitous, and that the lake was only temporarily viable.

Relatively rapid change? Or else they were on the edge as it was? The fact that they pyritized indicates low organic carbon and lots of reactive iron, so perhaps it wasn't a temperature change that killed them off...?

The ostracods were discovered by Richard Thomasson, an undergraduate student, during screening of the sediments in Ashworth’s laboratory at North Dakota State University.

Cool! I love it when undergrads make discoveries!

The details are extraordinary...Exceptionally, sub-micrometer-scale details such as setae and wrinkles are preserved as external moulds by coarse-grained coatings, but such resolution is typically associated with replacements by microcrystalline fabrics.

2 posted on 08/06/2008 12:40:32 AM PDT by Gondring (I'll give up my right to die when hell freezes over my dead body!)
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To: neverdem

Global cooling sucks.


3 posted on 08/06/2008 12:51:02 AM PDT by coconutt2000 (NO MORE PEACE FOR OIL!!! DOWN WITH TYRANTS, TERRORISTS, AND TIMIDCRATS!!!! (3-T's For World Peace))
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To: neverdem

Global warming from Paleozoic SUV’s?


8 posted on 08/06/2008 2:26:52 AM PDT by mylife (The Roar Of the Masses Could Be Farts)
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To: neverdem; SunkenCiv
The researchers point out that there is no evidence to suggest the fossil discovery points to a once widespread Antarctic lake ostracod fauna: "It is most likely their introduction was by chance, perhaps via birds as dispersal of ostracod eggs attached to the feathers or feet of migratory birds is an important influence on modern ostracod distribution."

perhaps by the same birds that once sat in the trees

that left their stumps in the ground and fossilized bark

and leaves...after the birds flew back to where they migrated from?

9 posted on 08/06/2008 2:52:48 AM PDT by Fred Nerks (fair dinkum!)
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To: neverdem
Fossil Plesiosaur Discovered in Antarctica.LINK>

Paleontologists from the United States and Argentina discovered one of the most complete plesiosaur skeletons ever found. (A plesiosaur is a swimming marine reptile that lived about 70 million years ago. At that time the waters of what is now Antarctica were much warmer than they are today.) The fossil plesiosaur was discovered during a 2005 expedition to Antarctica. The fossil goes on display today at the South Dakota School of Mines and Technology's Museum of Geology.

This plesiosaur specimen is a juvenile of about 5 feet (1.5 meters) in length. An adult plesiosaur is about 32 feet (10 meters). It was perfectly articulated and complete, except that the skull had been lost to erosion. The plesiosaur was excavated from deposits of shallow marine sands covered by volcanic ash. Paleontologists speculate that the volcanic blast or debris thrown into the ocean was responsible for the plesiosaur's death...

Artist's impression of the plesiosaur and environment. Painting by Nicolle Rager, National Science Foundation.

10 posted on 08/06/2008 3:09:23 AM PDT by Fred Nerks (fair dinkum!)
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To: neverdem
Tectonic Plate Motion - Wasn't Antarctica once located at another (warmer) latitude?
14 posted on 08/06/2008 4:47:28 AM PDT by MrBambaLaMamba (Hussein Obama for Caliph 2008!)
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To: neverdem; FrPR; enough_idiocy; rdl6989; IrishCatholic; Normandy; Delacon; ...
 




Beam me to Planet Gore !

15 posted on 08/06/2008 4:55:18 AM PDT by steelyourfaith
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To: neverdem

Global cooling; the earth is freezing. We’re ALL GONNA DIE!


17 posted on 08/06/2008 5:13:33 AM PDT by Lion Den Dan
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To: Salena Zito; Buckhead; Richard Poe; Tolerance Sucks Rocks; wardaddy; Joe Brower; Cannoneer No. 4; ..
Lord Nelson and Captain Cook's shiplogs question climate change theories

Where’s the Landslide?

Protection has more people packing heat

From time to time, I’ll ping on noteworthy articles about politics, foreign and military affairs. FReepmail me if you want on or off my list.

19 posted on 08/06/2008 8:30:39 AM PDT by neverdem (I'm praying for a Divine Intervention.)
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related:

Ancient Vegetation, Insect Fossils Found in Antarctica
Fox News
Posted on 08/05/2008 9:56:54 AM PDT by Scythian
http://www.freerepublic.com/focus/f-news/2056891/posts

http://www.physorg.com/news137089101.html


20 posted on 08/06/2008 8:44:26 AM PDT by SunkenCiv (https://secure.freerepublic.com/donate/_______Profile hasn't been updated since Friday, May 30, 2008)
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To: neverdem
"The fossils therefore show that there has been a substantial and very intense cooling of the Antarctic climate after this time interval that is important for tracking the development of the Antarctic icesheet – a key factor in understanding the effects of global warming.

WHAT?!!! A global cooling disaster before mankind was around will help explain the predicted next global heating? For $500, Alex, who caused the freezing of Antartica? That would be: who is plate tectonics?

22 posted on 08/06/2008 8:58:53 AM PDT by xJones
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To: neverdem

Folks, don’t forget continental drift. Antarctica always wasn’t there. The continents on the Earth MOVE, abet slowly. The question which should have also been addressed is where was Antarctica located when this fossil was formed?


37 posted on 06/28/2010 6:03:10 PM PDT by Citizen Tom Paine (Trust but verify.)
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