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Theft of Moqui Marbles in Grand Staircase National Monument - Talking Tree
These round balls are called moqui marbles are natural and take millions of years to erode out of solid Navajo Sandstone – They are hard concretions of iron that formed in the sandstone. After they are exposed to millions of years of sunlight they develop a dark polished patina called #DesertVarnish which takes eons to …