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03-Aug-2020 08:48

The new find suggests such raptors go back much further in time than previously thought.

Until recently, dromaeosaurs had been found only in Asia and North America and only in the Cretaceous period, which ran from 145 million to 65 million years ago.

The scientists say they found what appear to be hammerstones and stone anvils at the site, showing that ancient humans had the manual skill and knowledge to use stone tools to extract the animal's Bone Marrow and possibly to use its bones to make tools.

The site was named Cerutti Mastodon site, in honor of Richard Cerutti, who made the discovery and led the excavation.

Advanced radiometric dating technology allowed scientists to determine the mastodon bones belong to the Late Pleistocene period, or 130,000 years old, with a margin of error of plus or minus 9,400 years."The bones and several teeth show clear signs of having been deliberately broken by humans with manual dexterity and experiential knowledge," Holen said in a press release.

Experts agreed that the earliest records of human ancestors in North America is about 15,000 years old, but the discovery of the Cerutti site "shows that human ancestors were in the New World ten times that length of time," said paleontologist Lawrence Vescera.

Evidence that they existed in the Southern Hemisphere has been mounting.

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"It not only provides definitive evidence for a more global distribution and a longer history for dromaeosaurs than was previously known, but also suggests that dromaeosaurs on northern and southern continents took different evolutionary routes after the landmasses that they had occupied, drifted apart." The Buitreraptor fossil was found in northwestern Patagonia (the southern end of the South America continent) about 700 miles southwest of Buenos Aires.

It has a long head and long tail and wing-like forelimbs.

Its serrated teeth, like steak knives, suggest it was a carnivore.

_______________________________________________________________ Comment: 130,000 B. Therefore the theory of ancient Humans entering the Americas by crossing the Bering Straits, and then "By-passing" the FROZEN North American Continent, by Boat travel along the Coast, is totally out of the question.

The only other "Reasonable" possibility is an ATLANTIC crossing, similar to how ancient Africans reached Australia by "Island Hopping" more than 60,000 years ago.

"It not only provides definitive evidence for a more global distribution and a longer history for dromaeosaurs than was previously known, but also suggests that dromaeosaurs on northern and southern continents took different evolutionary routes after the landmasses that they had occupied, drifted apart." The Buitreraptor fossil was found in northwestern Patagonia (the southern end of the South America continent) about 700 miles southwest of Buenos Aires.It has a long head and long tail and wing-like forelimbs.Its serrated teeth, like steak knives, suggest it was a carnivore._______________________________________________________________ Comment: 130,000 B. Therefore the theory of ancient Humans entering the Americas by crossing the Bering Straits, and then "By-passing" the FROZEN North American Continent, by Boat travel along the Coast, is totally out of the question.The only other "Reasonable" possibility is an ATLANTIC crossing, similar to how ancient Africans reached Australia by "Island Hopping" more than 60,000 years ago.Legend: Mesoamerica = Mexico and Central America Pre-Columbian = Before Christopher Columbus Amerindian = Indigenous Indians of North and South America Paleoindian/Paleoamerican = The original Black settlers of the Americas The discovery of a bird-like dinosaur in South America has paleontologists rethinking when, where and how one group of raptors evolved.