Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Paradigm battles

  1. Aug 22, 2006 #1
    The earth science battlefields are as fierce as any other. One highly contested paradigm is the peopling of America. And quite unwillingly, a major feature in that battle is poor innocent Virginia Steen-McIntyre, who was so unfortunate to date volcanic ash layers that covered some paleo indian stone tools to an ago of some 260,000 years

    That story is http://disputatio.com/articles/006-1.pdf [Broken] and it took 15 years of ardent battling to get those results published in:

    Steen-McIntyre, Virginia; Fryxell, Roald; Malde, Harold E (Jul 1981) Geologic evidence for age of deposits at Hueyatlaco archeological site, Valsequillo, Mexico . Quaternary Research, vol. 16, no.1, pp.1-15

    As everything bound to get on the net eventually, this paper is now available too, at least the first ten pages:

    http://www.valsequilloclassic.net/VSM/quaternary_research/quaternary_research_1981.pdf [Broken]

    But much more on her website here:

    http://www.valsequilloclassic.net/VSM/index.htm [Broken]

    I love those little anomalies, challenging mainstream science and 260,000 old Clovis type flute points (normally 12-11,000 years old) is outrageous. However, looking at (studying) the pictures and reading the story, I'm not so sure anymore if there could be a simple down to earth explanation. That mud mixed with the tephra layer is suspicious Those tools may not be older than 260,000 years at all. They may in fact have any age.
    Last edited by a moderator: May 2, 2017
  2. jcsd
  3. Aug 22, 2006 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Quick look at the stratigraphy --- too many possible interpretations to call it an "anomaly" --- more along the lines of "Gee, it's the second half of the 20th century, and we're trained geologists, paleontologists, and can untangle any stratigraphic puzzle" vs. the hard reality of messy sedimentary processes.
  4. Aug 23, 2006 #3
    Right. I was thinking of (recent) mud flows which do happen sometimes in hilly areas like that which could have mixed the tephra with mud as narrated, covering much younger strata.

    But really, if true then it's again

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook