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Here are links to Port listed articles on the same subject:
From 2007, when Allen West and James Kennett presented the theory at the spring American Geophysical Union meeting: http://www.megalithic.co.uk/article.php?thold=-1&mode=flat&order=1&sid=2146412999#17140.
And an alternate view: see the recent article attached to the site listing for Murray Springs.
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