a. A type of hot spring containing boiling mud, usually sulfurous and
often multicolored, as in a paint pot. Mud pots are commonly associated
with geysers and other hot springs in volcanic areas, esp. Yellowstone
National Park, WY. AGI b. A geyser that throws up mud. Also called mud geyser.
Standard, 2; Fay
Dictionary of Mining, Mineral, and Related Terms