Map of Yellowstone National Park showing Lava Creek Tuff deposits and sample locations

Map of Yellowstone National Park showing Lava Creek Tuff deposits and sample locations. Different colors indicate deposits traditionally assigned to member A (purple), member B (yellow), and the Sour Creek dome (green). Amphibole symbols mark locations where amphibole was identified. Adapted from Henderson and others (2026), https://doi.org/10.1016/j.jvolgeores.2026.108753.