Visitors watch from an observation deck as Raymond Dierdorf, an intern at the park, removes layers o
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190802_Ashfall_194
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January 19, 2017
Visitors watch from an observation deck as Raymond Dierdorf, an intern at the park, removes layers of ash over a rhino skull. Ashfall Fossil Beds State Historical Park in north central Nebraska. August 2, 2019. Photo by Craig Chandler / University Communication.