Item: "Mud Volcano" Yellowstone National Park Postcard
Description: Up for sale is this color photo postcard "Mud Volcano water contains an abundance of gray mud. This mud is of the spring's own making. The highly acid water leaches materials from the surrounding lava rock. This leaves behind a clay-like residue. Mixed with the agitated water of the spring, it is this residue which gives the Mud Volcano its muddy consistency and color."Continental Card. Yellowstone Park Co., Wyoming
Age: 50s or 60s
Size: 4 by 6 inches.
Condition: The very slightest edge wear. This is an unused card
This is a nice classic postcard design. Buy it now to make this yours.