Yellowstone News and Information

  The Changing Moods of Colloidal Pool in Norris Geyser Basin By Lauren Harrison, PhD , USGS Release Date: November 15, 2021   Many of Yellowstone’s hot springs, geysers, mud pots, and fumaroles look different depending on the season, year, or sometimes even the day one visits. Colloidal Pool, in Norris Geyser Basin, is an interesting example of a feature that changed over the course of summer 2021. Yellowstone  Caldera   Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from Lauren Harrison, postdoctoral researcher with the U.S. Geological Survey.   Comparison of (a) 1904 Historical map with (b)  1988 USGS map . Colloidal Pool is a large, labeled pool roughly located on a straight line between Hurricane vent and Whirligig Geyser on the 1988 map (b); this same transect on the 1904 map (a) shows no feature at that location (white circle). Note: maps are not at th