This Postcard book is one of the series produced to share the splendor and beauty of America’s National Parks and natural areas. Each title includes 14 individual postcards featuring the imagery of America’s leading landscapes photographers and expanded interpretive captions.
Although prospectors first described these “moving rocks” in the early 1900’s-no one took it seriously. Rocks leaving a wake in the playa surface of Race Track Valley (and others) high in the Cottonwood and Grapevine Mountains- surely a tall tale. Yet-there they are. It is assumed, though no one has yet to seen it happen, that these rocks (some up to 600 lbs.) are skidded, or literally sailed, by extremely high winds across the playa surface when it is wet and very slippery due to the extremely fine granite clay of which it is composed. The tracks often curve, turn right angles, and even loop back on themselves.’
-From “Death Valley Postcard Book”
Death Valley: Postcard Book
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