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Originally posted by Hanslune
A rather technical discussion on Topper at the Hall of Maat: Warning Archae tech lingo in full bloom!
A discussion between a butcher and a brain surgeon on how to proceed with removing a brain tumor without killing the patient is not a pissing contest. Let's see who the surgeons are.
Originally posted by Hanslune
If - as the one article notes, the date is correct, it would throw things around. Siberia is not particularly well surveyed for archaeological sites - but then most of the world isn't either!
But supposedly a bunch of sites in extreme northeastern North America are now under water. It would be fascinating to know what can be found there, date it, and see the patterns of migrations.
“…The timing of the first change from meandering to braided is unknown, with only dates in excess of 50,000 yr B.P. being reported from the upper portion of the deposits of the first meandering stream package. This study of the terraces at the Topper site yielded similar minimum limiting ages (>55,000 yr B.P.) for the initial meander period. Leigh and others (2004) have suggested that the shift from meandering to a braided stream regime occurred in other streams in the Southeast possibly as early as 70,000 yr B.P. and as late at 30,000 yr B.P., though this age span may reflect precision limits on radiocarbon dating…”
As of 2007, the limiting age for a 1 milligram sample of graphite is about ten half-lives, approximately 60,000 years. This age is derived from that of the calibration blanks used in an analysis, whose 14C content is assumed to be the result of contamination during processing (as a result of this, some facilities will not report an age greater than 60,000 years for any sample).
During those thousands of years Beringia was an arid, desolate land with thin snow cover and strong winter winds and storms. In the spring, rains and melting snowdrifts would change the barren land into a patchwork of vegetation. Beringia was mainly a treeless land with most plants being very low shrubs. In the rare more sheltered places alder, dwarf-birch and heath shrubs would be found. In these sheltered area animals would graze and browse on the available plants.
Meadows Rockshelter is an archaeological site located near Avella in Washington County, in southwestern Pennsylvania, United States. A rock shelter in a bluff overlooking Cross Creek (a tributary of the Ohio River), Meadowcroft Rockshelter is located about 36 miles west-southwest of Downtown Pittsburgh and is part of the Pittsburgh Metro Area. It is operated by the Heinz History Center.
The site was excavated from 1973 until 1978 by a University of Pittsburgh team led by James M. Adovasio. Radiocarbon dates from the site indicated occupancy as early as 16,000 years ago and possibly as long as 19,000 years ago. The "Clovis First" camp has tried to dispute the age of the findings, but generally their efforts have been dismissed. Although the dates are still controversial to some, archaeologists familiar with evidence from the site agree that Meadowcroft was used by Native Americans in the pre-Clovis era, and as such, provides evidence for very early human habitation of the Americas. In fact, if the 19,000 years ago dating is correct, Meadowcroft Rockshelter is the oldest known Native American cultural site.
Meadowcroft Rockshelter has yielded Woodland, Archaic and Paleoindian remains, indicating evidence of the processing of animals, such as deer, elk, bird eggs, and mussels; as well as plants such as corn, squash, fruits, nuts and seeds. The site also has yielded many tools, including ceramics, bifaces, biface fragments, lamellar blades, a lanceolate projectile point and chipping debris. At least one basin-shaped hearth was reused over time.
It was given the name Meadowcroft from the nearby Meadowcroft Village historical park. Although sometimes referred to as "Meadowcroft Rock Shelter", the more accepted and popular term is "Meadowcroft Rockshelter".