Doing geology field work in the greater Yellowstone area during the fall is always an adventure. This is the time that animals and birds are on the move, so it’s a good opportunity to have interesting chance encounters. In my quest to understand the Eocene thermal springs of the Gravelly Range in southwestern Montana, I’ve spent time in the Yellowstone area hiking around thermal areas. The Artists Paint Pots, located a few miles southwest of the Norris Geyser Basin, appear to be a likely analogy for the Gravelly Range thermal strata. Of particular interest is the red staining that occurs in many meters of Gravelly Range thermal deposit strata. The red stained rocks are ubiquitous in the Red Hill and Middle Springs areas.
The Artist Paint Pots, especially the Blood Geyser, are well known for red-colored rocks that are produced by iron oxides precipitating out of the thermal waters and staining the surrounding rocks.
As I said earlier in this blog, doing fall field work in the greater Yellowstone area usually means exciting chance encounters with various animals and birds. Some encounters are a bit more exhilarating than others, but I did manage to photo-document some in between finishing up field work for the season: