Arvid Aase , Head Curator at Fossil Butte National Monument in Wyoming, will present “Death to Discovery: Taphonomy of the Fossil Lake Lagerstatten (Green River Group).”

Lakes are divided into three types: overfilled, balance-filled, and under-filled. The characteristics of a balance filled lake create the greatest opportunity for conditions conducive to fossil preservation. Fossil Lake was all three lake types through its 2-million-year existence during the Early Eocene. Not all sediment deposited during balance-filled episodes preserved abundant, well-preserved fossils, but all highly fossiliferous layers were deposited during balance-filled episodes. The ten most important conditions are explained. The mineralizing component of taphonomy is dominated by carbonization and original material with examples of each type in a variety of organisms.

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Topic: ESCONI Paleontology Study Group Feb 21, 7:30PM
Time: Feb 21, 2026 07:30 PM Central Time (US and Canada)

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