July 16, 2015: Besides Midway Geyser Basin, here are some other thermal areas on the way to Old Faithful:
“The name Biscuit Basin was adopted in the late 1880s because of the unusual biscuit-shaped geyserite formations that used to surround Sapphire Pool. Following the 1959 Hebgen Lake earthquake, Sapphire erupted—and the “biscuits” were blown away.” This pool was fascinating and looked so deep!
In the Upper Geyser Basin, I heard a tour guide say that he always brought tours here because this geyser was always spouting off.
It didn’t go very high, but it was still fun to watch.
It broke my heart to read how this pool has changed color over the years due to stupid people throwing stuff into it: “Objects thrown into the pool and natural debris have caused a further decrease in temperature, resulting in a change of bacteria and algae growth and thus a change of color. The edge of the pool is now orange and brown. If the temperature continues to decrease, the pool may lose its emerald color.” WTH, people?!
My favorite Black Sand Basin scene – ribbons of color flowing into the water.
Fountain Paint Pot
Located in the Lower Geyser Basin, the mud is composed of clay and fine particles of silica broken down by acids and grinding action. The tinting of the mud in colors of pink and gray from iron oxides is derived from the original rock.
15 seconds of gurgling Fountain Paint Pots
Celestine Pool – A beautiful nearby hot spring
Bacteria Mat – who would have thought it could create something so beautifully colored?