ACKNOWLEDGMENTS
Our work is inspired by that of five of our USGS colleagues
and mentors, Robert Christiansen, Robert Fournier, Irving
Friedman, Patrick Muffler, and Donald White, who dedicated
much of their careers to understanding Yellowstone’s
amazing volcanic and hydrothermal systems. We appreciate
numerous stimulating discussions with them and with
our Yellowstone Volcano Observatory colleagues Bob Smith
and Hank Heasler. Tom Sisson, Bill Evans, and Cindy Werner
(all USGS) provided helpful reviews, as did Elements reviewers
Paul Wallace and Rick Hazlett. Atosa Abedini prepared
and analyzed the melt inclusions in TABLE 1. Joel Robinson
aided in the construction of FIGURE 1. Jeanne DiLeo provided
the artist’s touch evident in FIGURES 3 and 4. The
USGS Volcano Hazards Program funds our research.