By Will Dunham
(Reuters) -A new line of evidence provides more influence on ancient times of the vicinity discovered at the White Sands National Park in New Mexico that rewrites human history in the Americas.
The researchers used a technique called radioactive Crohn that dates back to determine that the organic matter in wetland mud remains and shallow lake deposits near fossilized foot impressions ranges between 20700 and 22,400 years. This is closely related to the previous results, based on the era of pollen and seeds on the site, that the tracks range from 21,000 and 23,000 years.
The effects of its feet, which were announced in 2021, indicate that humans are studying in the landscape in North America thousands of years ago what was previously believed, during the most unpleasant conditions in the last ice age, a time that is called the last extreme ice.
The age of the effects of the feet was a controversial problem.
In response to a question about how the new results are in line with the previous worlds, the archaeologist at the University of Arizona and the geologist Vans Holiday, the leader of the study, answered: “Wonderfully.”
Homo Sapiens grew up in Africa about 300,000 years ago and later spread all over the world. Scientists believe that our race entered North America from Asia through trips through a ground bridge that connects Siberia one day to Alaska. Previous archaeological evidence indicated that the human occupation of North America began about 16,000 years ago.
The fisherman who left the tracks crossed the plains of the flood in a river that flowed into an old body of water called Lake Otiro. The mud in which they walked included parts of the semi -aquatic plants that have grown in these wetlands.
The radioactive carbon history is used to determine the age of organic materials based on a counterpart called Carbon-14, which is an element carbon variable. Living organisms absorb carbon 14 in their tissues. After the death of a living organism, this counterpart changes to other atoms over time, providing a measure of age determination.
“Three separate carbon sources – pollen, seeds, organic signs and sediments – now dated by various radioactive carbon laboratories throughout the path of path, all indicate the last maximum of the iceberg in the environmental sciences in the field of science in the field of science,” said Jacon Windingstad, one of the candidates of the University of Arizona in the ice science in the ice science in environmental sciences.
The original study of the original 2021 is the effects of feet using radioactive carbon, dating back to the seeds of aqueous plant called Ditchgrass, which is found along with the tracks. A study published in 2023 radioactive carbon, dating back to coniferous pollen grains of the same layers of deposits, such as Ditchrass Seeds.
But some scientists looked at the seeds and pollen as unreliable signs of dating paths. The new study provides more impact on dating while giving a better understanding of the local scene at the time.
“When the original paper appeared, at the time, we did not know enough about the old scene because it was buried under the field of white sand dunes or was destroyed when the old lake Otiro, which had a lot of gypsum, was dried, after the last ice age and the wind eroded to create symbolic dunes.”
Today, the scene, which is located in the west of Alamogordo, consists of beige sand dunes of metal gypsum.
“The area and around the paths that came from the mountains to the east, the edge of the old lake and the wetlands along the margin of the lake. Dating shows that this environment continued before, during and after the time people left their paths,” Holidai said.
The region can provide important resources for the fishermen.
Holiday added: “We know the abundant paths in the region that at least from the Mamothy, the giant earth, the beauty and the terrible wolves were around them, and it is likely that other large animals. Given the preparation, there should be a large and varied group of other animals and also plants.”
The climate was significantly different from today, as it receives cold summer and the area more rain.
“It is important to note that this is a tracking site, not a housing site.” “It provides us with a narrow view of the people traveling through the scene. Where were they going and where they came is an open question and this is clearly required to discover the similar sites in the region. So far, this has not been found.”
(Will Dunaham’s reports in Washington, edited by Rozlabba O’Brien) participated in the reports of Will Dun.
