19th Annual Smithsonian Magazine Photo Contest Altered Images
Crater that Isn't

Pseudocrater on Lake Myvatn, Iceland. Most of Earth’s pseudocraters are in Iceland and they are rare elsewhere. The definition says, “The Myvatn pseudocraters were formed as lava entered a large lake, trapping its wet sediment underneath. First, many eruptions take place and a platform of fine-grained material is built up. Later, a few eruption vents take over, the water supply diminishes, and well-shaped crater cones develop on top of the platform. The molten lava moves like a thin sheet inside a stationary crust. The lower crust breaks and the hot lava makes contact with the water-logged sediment underneath triggering violent steam eruptions. The lava continues to flow inside the crust envelope and feeds the steam eruptions.” Taken by a drone.

Photo Detail
Date Taken: 10.2021
Date Uploaded: 11.2021
Photo Location: Iceland
Copyright: © Daniel Franc