Doublet Pool
Doublet Pool is a hot spring in the Upper Geyser Basin of Yellowstone National Park, Wyoming.
Doublet Pool is deep and its temperature is approximately. Its scalloped edge is made of geyserite. Eruptions can occur in Doublet Pool, but only last up to 8 minutes. The pool on the right pulses over the vents about every two hours. Occasionally there will be vibrations, surface wave motion, and thumping; these effects are caused by collapsing gas and steam bubbles deep underground.