2 Responses

  1. Mike Clark
    Mike Clark at |

    Rick

    I went to a presentation tonight that you would have enjoyed. A small group with the USGS
    is working on the deposits north west of Las Vegas Nevada. The deposits have a wet and dry cyclicity related to and mirrord with the sudden changes recorded by the greenland Ice sheet cores. When there were sudden drops in global temperatures, the springs, and marshes in the deserts would fill with water.
    When there was a sudden increase in temperatures, the springs and marshes in the deserts would dry up.
    There was also a very pronounced correlation with the Younger Dryas. He was stating that the temperature changes at both ends of the Younger Dryas of 6 degrees C happened in about one decade.

    I told him about the possibility of the Sudden changes being initiated by the ocean waters accessing the Medeterranian Dry Basin, which creates a lowering of ocean levels, and a glacial growth feed back system created by the effective increasing in land elevation created by lowered sea levels,

    The cyclicity is a few thousand years of wet alternating with a few thousand years of dry. This would correlate with a few thousand years of cold followed by a few thousand years of hot.

    Interesting : They are using Carbon Dating for the Upper layers, and Luminescent Dating below the time limit of Carbon dating. I has something to do with the rate of decay of the surface of quarts sand grains following the last time they were exposed to sunlight.

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