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Geology: Pink quartzite was carried 600 miles across the US in the stomachs of long-necked DINOSAURS


Large lumps of pink quartzite were transported some 600 miles across what is today the American Midwest in the bellies of long-necked dinosaurs, a study concluded. 
Researchers from the US explained that the giant sauropods likely swallowed the stomach stones, known as gastroliths , to help grind up food they had eaten.
The gastroliths ended up being buried in Wyoming s Morrison Depositional Basin during the Late Jurassic, 155–148 million years ago, when the dinosaurs perished.
The team knew the stones could not have originated there, as pink quartzite in North America is only found deposited in Idaho, Montana, New Mexico and Wisconsin.
By analysing minerals called zircons that act as little clocks, the team determined that the gastroliths formed 1.8 billion years ago, matching those from Wisconsin. ....

United States , New Mexico , Appalachian Mountains , Canada General , Femke Holwerda , Josh Malone , George Reber Weiland , David Malone , University Of Texas At Austin , York Adelphi University , University Of California Museum Paleontology , Royal Tyrrell Museum , Illinois State University , American Midwest , Morrison Depositional Basin , Late Jurassic , North America , Bighorn Basin , Morrison Formation , Baraboo Formation , Baraboo Interval , Morrison Basin , Biology Letters , Michaeld Emic , New York , Adelphi University ,

Primates Appeared Almost Immediately After Dinosaurs Went Extinct, New Research Suggests


Primates Appeared Almost Immediately After Dinosaurs Went Extinct, New Research Suggests
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Filed to:cenozoic
cretaceouspaleogene extinction eventdinosaurenvironmenteric sargisgeological history of earthgregory wilson mantillamammalmammal taxonomyp ceratopsp janisaep mckeeverip uniopaleocenepaleogeneplacentaliaplesiadapiformesprimatepurgatoriusstephen chester
Artist s depiction of Purgatorius mckeeveri. (Image: Primates Emerged Almost Immediately After the Dinosaurs Went Extinct, New Research Suggests)
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A formation famous for producing
T. rex fossils has now yielded the oldest evidence of primates in the fossil record, in what is being hailed a significant discovery. ....

New York , United States , Hell Creek , Garfield County , Gregory Wilson Mantilla , Stephen Chester , Eric Sargis , City University Of New York , Yale University , University Of Washington , Brooklyn College , University Of California Museum Paleontology , Royal Society Open Science , Royal Society Open , City University , Gregory Wilson , California Museum , Garfield County Montana , Late Cretaceous , North American , Late Triassic , புதியது யார்க் , ஒன்றுபட்டது மாநிலங்களில் , நரகம் க்ரீக் , கார்‌ஃபீல்ட் கவுண்டி , ஸ்டீபன் செஸ்டர் ,