Crater of Mud Volcano, Yellowstone national park
Genuine Curteigh-Chicago "C.T. Art-Colortone" Post Card
Crater of Mud Volcano, Yellowstone Park, a paint pot about thirty feet in size emitting frequent bursts of steam; but since 1898 has had no violent eruption. In 1870 N.P. Langford witnessed an eruption of the Mud Volcano which attained a height of several hundred feet.