Squashed in a rock

Fifty million years ago, a giant salt lake existed in northwestern Colorado. Leaves, feather-like seeds (upper right, above), and a diverse array of insects, such as the lacewing shown above, fell into the lake. Over the millennia, the tissues of these organisms became mineralized—only to be later dissolved away by groundwater. Now all that remain are the bleached outlines of where the minerals used to be. Truly a ghost of a fossil!

James Hagadorn, PhD

Tim & Kathryn Ryan Curator of Geology

Kristen A. MacKenzie, MS

Earth Sciences Collections Manager

Nicole Neu-Yagle, MS

Earth Sciences Assistant Collections Manager

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