An unnamed but charismatic thermal feature alongside Ferris Fork, near the Bechl

An unnamed but charismatic thermal feature alongside Ferris Fork, near the Bechler River. The center of the pool is roiling with gas bubbles, but not boiling! The pool is only about 180 degrees F (81 degrees C), and all the gas is bubbling up from underground. The white color is due to the silica-saturated water depositing sinter as it flows out and cools, while the red and green patches are cooler areas where algal mats thrive. USGS photo taken on September 17, 2018, by Sara Peek.