The discovery of fluted spear points in northwest Alaska strongly
suggests that early humans carrying American technology lived on the
central Bering Land Bridge about 12,000 years ago, showing that peopling
of the Americas was more complex than previously believed, according to
a research team led by a Texas A&M University professor.
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12,000-year-old fluted points found among the Serpentine Hot Springs
artifacts [Credit: Texas A&M University] |
Ted Goebel, professor of anthropology, along with colleagues Mike
Waters, Heather Smith and Kelly Graf, all associated with the Center for
the Study of the First Americans at Texas A&M, and researchers from
Baylor University, the University of Georgia, the National Park
Service, the Bureau of Land Management and the Desert Research Institute
have had their findings
published in the online version of the Journal of Archaeological Science.
The project was funded by the National Science Foundation, the National
Geographic Society, and National Park Service’s Shared Beringia Heritage
Program.
The researchers focused on an area in Alaska called Serpentine Hot
Springs, now part of the Bering Land Bridge National Preserve located on
the Seward Peninsula. Park archaeologists in 2005 discovered a fragment
of a fluted spear point, long known as a hallmark of North American
Paleoindian cultures. Goebel and the team later excavated the site,
finding more fluted points.
“This shows for sure that there were humans on the land bridge by the
end of the Ice Age, 12,000 years ago, because the spear points were
found with charcoal and bone radiocarbon dated to that time,” Goebel
explains.
“Several of the spear points were found in our excavation along with
charred animal bones, probably caribou which ancient humans butchered
and ate there at the site. So the question becomes, ‘Who were these
people , and where did they come from?’”
Goebel says that among the earliest residents of North America were
members of the Clovis culture, thought to date to about 13,000 years
ago. Clovis people specifically fashioned their stone spear tips with
grooved, or fluted, bases. Such human-made projectile points have been
known in Alaska since 1947, having been found at as many as 20 different
archaeological sites.
“But no one has been able to determine the age of fluted points in
Alaska – were they younger, the same age as, or older than the Clovis
residents in temperate North America?” Goebel says.
Scientists have chiefly considered two scenarios about Alaska’s fluted
point makers: either they were a pre-Clovis population that moved
southward at the end of the Pleistocene era, or they were post-Clovis
migrants who spread from south to north.
“The evidence from Serpentine supports the second theory – that either
Paleoindian people or technologies were moving in a reverse migration
pattern, from south to north, or more specifically, from the high plains
of central Canada in a northerly direction into Alaska,” he points out.
Goebel says the findings show new possibilities about when and from where the early settlers of the Bering land bridge arrived.
“Not all of Beringia’s early residents may have come from Siberia, as we
have traditionally thought,” he notes. “Some may have come from
America instead, although millennia after the initial migration across
the land bridge from Asia. If the fluted points do not represent a human
migration, they at least indicate the surprisingly early spread of an
American technology into Arctic Alaska.”
He notes that the fluted points were used by the Serpentine residents as
weapon tips for hunting large animals, such as caribou or bison. The
bow and arrow would not appear in Alaska for several thousand more
years.
“We know these early settlers were very mobile – they traveled great distances,” Goebel adds.
“Humans carried tools made of the volcanic glass called obsidian to the
site from nearly 300 miles inland in central Alaska. The artifacts and
other debris they left behind suggests very short stays, perhaps just
several days and nights.
“Nonetheless, fluted points have yet to be found in neighboring Chukotka
(in Russia) suggesting that the fluted-point makers never made it any
further west than the Seward Peninsula. By 12,000 years ago, the land
bridge was becoming swamped by the rising Bering and Chukchi seas.”
For more about the Center for the Study of the First Americans,
go to their website.