John Day Fossil Beds

Painted Hills in the John Day Fossil Beds National Monument in Oregon. The Painted Hills are composed mostly of claystone layers originally formed by volcanic eruptions of the Cascade Mountains 100 miles west. Various elements now mix to produce the rus

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Badlands Beds Cenozoic Claystone Eroded Fossil Hills Iron John Monument Oregon Outcrop Oxide Oxidized Painted Paleontology Period Staining Stripes Tertiary Volcanic Weathering

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