ALEX VOLBORTH 1924-2009 - THE DICE
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"Geology in Action!" Ripple marks. In front lower left, cross-bedded
Jurassic Red Sandstone, over 135.000000 years old, petrified dunes with
wind-blown ripple marks still detectable. Behind, ripple-marks-covered
delta-like surface formed a few days ago after strong rains! Still loose
soft, moist sand! Desert north of the Valley of Fire, near Overton, Nevada.
12/30/2003