DescriptionNeedles from Harney Peak.JPG English: The Needles as seen from the top of Harney Peak. Date 6 September 2009 Source Own work Author Jake DeGroot...
as the Pony Express National Historic Trail. Mail could reach California from Missouri in ten days across eight states. Date 30 April 2017 Source U.S....
DescriptionHarney Peak Granite (late Paleoproterozoic, 1.695 to 1.715 Ga; Needles, Black Hills, South Dakota, USA) (38366807454).jpg Granite in the Precambrian...
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