. . . "524.256"^^ . "Ashfall Fossil Beds State Historical Park"@en . . . . . . . "The Ashfall Fossil Beds of Antelope County in northeastern Nebraska are rare fossil site types called lagerst\u00E4tten that, due to extraordinary local conditions, capture a moment in time ecological \"snapshot\" in a range of well-preserved fossilized organisms. Ash from a Yellowstone hotspot eruption 10-12 million years ago created these fossilized bone beds.The Ashfall Fossil Beds are especially famous for fossils of mammals from the middle Miocene geologic epoch."@en .