#YDB impact confirmed again: Volcanos and Asteroids and Mammoths — Oh My!

My dear Kepler, I wish that we might laugh at the remarkable stupidity of the common herd. What do you have to say about the principal philosophers of this academy who are filled with the stubbornness of an asp and do not want to look at either the planets, the moon or the telescope, even though I have freely and deliberately offered them the opportunity a thousand times? Truly, just as the asp stops its ears, so do these philosophers shut their eyes to the light of truth.

Galileo to Kepler — 1610

Screen Shot 2014-04-14 at 10.25.49 AM

Press Release from Liverpool John Moores

I have only scanned this new paper and there is a lot in there. Cheers to readers who help sort through.

We report new stratigraphic, tephrochronology and dating results from the Tocuila Mammoth site in the Basin of Mexico. At the site there is evidence for a thin meteorite airburst layer dated between 10,878 and 10,707 cal BC at the onset of the Younger Dryas (YD) cool period. The Upper Toluca Pumice (UTP) tephra marker, caused by a Plinian eruption of the Nevado de Toluca volcano, dated from 10,666 to 10,612 cal BC,is above that layer. The eruption must have caused widespread environmental disruption in the region with evidence of extensive reworking and channelling by the Lake Texcoco shoreline and contributed to the widespread death and/or extinction of megafaunal populations, as suggested by earlier authors, but the new work reinforces the view that both catastrophic events must have caused large environmental disruption in a short time period of around two hundred years. There is no evidence for megafauna (mammoths, sabre toothed cats, camels, bison, glyptodonts) after the UTP volcanic event and subsequent lahars in the Basin of Mexico. — From abstract


Tocuila Mammoths, Basin of Mexico: Late Pleistocenee Early Holocene stratigraphy and the geological context… by George Howard

  • http://malagabay.wordpress.com/2014/05/09/cliff-and-the-piedmonts/comment-page-1/#comment-2012 Steve; We’ve talked in the past about glacial movement and haow the norm doesn’t seem to fit with what we see. I came across this article with a different spin on movement that has a picture as evidence. The article seems to be interspersed with musical references but you can get past them easily enough. See what you think on this.

  • HI Jim,

    I’m afraid Melting, or glazing, isn’t going to happen if you heat a piece of limestone; even in a kiln. You might want to read a bit on the chemical reactions of calcium carbonate, or CaCo3. It’s pretty basic high school chemistry stuff.

    If you heat a piece of calcium carbonate, or limestone, until it is red hot, the carbon in it will evaporate away, leaving you with calcium oxide, CaO, AKA quick lime, or burnt lime.

    It’s also known as "unslaked lime". Mixed with sand and water  it became the base for Roman concrete.

    Add water to calcium oxide (careful kids, this part can produce a lot of heat if it isn’t done properly) and you get "slaked lime", or calcium hydroxide.  Slaked lime forms the base for the lime plaster we see in the frescoes of the Sistine Chapel.

    So basically if your piece of dolomite, or limestone is still calcium carbonate, then you can know it hasn’t been altered by the heat of an impact.

  • Dennis; Thanks for the info. Now I have to figure how the limestone got it’s polished surface without showing any striations or signs of polishing. I don’t believe weathering can produce that fine a finish, plus even the surfaces that aren’t exposed to the weather show the polished look. Big pieces, small pieces all the same with the pinhole exterior. The only thing I have seen so far that looks like it is the Rhynie chert from Scotland