Raymond Dierdorf, an intern at the park, and Rick Otto, Superintendent of Ashfall Fossil Beds State
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190802_Ashfall_131
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January 19, 2017
Raymond Dierdorf, an intern at the park, and Rick Otto, Superintendent of Ashfall Fossil Beds State Historical Park, discuss the project as Dierdorf 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.