"Not being a skeptic but what exactly make wear patterns different from
normal moving of rocks because of erosion? This seems to be a specialty
that lithic specialists understand. How does a rock become a tool and a
tool with wear patterns?"
"What sites are we actually seeing proposed wear patterens? Is it just
Imagine you have a neighborhood BBQ, and afterwards you bury all the
dirty knives and spatulas and forks etc (even if they are plastic).
Come back in a few years and dig them up and you will see some of the
gunk still sticking to them, even if it's dried out. You can tell the
implements were used.
The same with stone tools. If you have a favorite knife and skinned a
lot of rabbits and dear with it, the edge develops evidence of use wear
damage. An artifact edge can always be damaged and can appear to
exhibit usewear, but maybe it was only dropped on the ground or stepped
on. But when you work with wood, bone, flesh, vegetation, it sometimes
leaves a gloss on the edge that can identify what the tool was used on
and how it was used (i.e. the motions used, like cutting or scraping).
And the polish, and/or gloss sticks to the stone edge and can last for
a long time depending what kind of dirt it was buried in. These are
stone artifacts with close-ups of their edges; they are from a Paleo
site in Brazil called Pedra Furada. Even the Valsequillo and Calico
artifacts might still have this micro usewear evidence on their edge.
(It takes an expensive microscope.) If so, it proves that someone
actually used the artifact, and so it stands as very strong evidence
for definite human presence in very old sites.
There are other sites on the web that deal with this and provide other
photos. I don't have them handy but they are googleable: usewear,
lithics, polish, gloss -- should get you there. Hope that helps.
"What will be the tipping point? This site or Calico or Valsequillo or
God knows. I'm starting to think UFOs will be landing at the White
House before the that tipping point arrives. The new headlines about
16,000 year old Siberian Vancouverites are a step in the right
direction. Anything with Pleistocene boats in it is probably a step in
the right direction. It is an absolute nuclear bomb that departments
tried to shield themselves from for over a century. It is going to be
hard to swallow for the Academy, who were generally so adamant for much
of that time against any talk of pre-Columbian (pre-1492) boats to the
Americas. Now it seems boats are being figured all over the place.
Enjoy the ride.
THE FIRST AMERICAN
http://www.amazon.com/First-American-Su ... overed/dp/
FIRST AMERICAN Article
NATIVE AMERICAN GEOMETRY