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Back when Colorado was covered in a shallow sea, slick predatory fish up to 20 feet long, like Xiphactinus audax, cruised about, looking for their next meal. This specimen, from the 75-million-year-old Pierre Shale, was found in 1967, near Snowmass, Colorado.
Kristen A. MacKenzie, MS
Earth Sciences Collections Manager
Nicole Neu-Yagle, MS
Earth Sciences Assistant Collections Manager
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