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American Journal of Science

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Title: American Journal of Science

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Message History

New mapping of a sand sea approximately 60,000 square kilometers in northern Saudi Arabia area, and its underlying geology links Pleistocene footprints, geological faulting and ancient topography.

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A  Miocene-aged calcite coating that has formed in a basalt that represents a paleo-water-table in the Western Grand Canyon region.  In caves, this is equivalent to a cave mammillary.

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New laser-ablation mapping shows that major and trace elements in carbonates record original seawater chemistry and later diagenetic fluids on a micron scale.

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