By Dr. John H. Whitmore The cross-bedded Coconino Sandstone (lower Permian, Arizona) is often used as a “type” ancient eolian sandstone. …read more
Source: AIG Daily
By Dr. John H. Whitmore The cross-bedded Coconino Sandstone (lower Permian, Arizona) is often used as a “type” ancient eolian sandstone. …read more
Source: AIG Daily
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