Avak Crater

Avak Crater

Avak is an impact crater centered approximately 12 km (7.5 mi) southeast of Barrow, Alaska, United States.

Avak is a subcircular structure about 8 km (5.0 mi) in diameter and 1 km (0.62 mi) deep. In the structure, metamorphic basement rocks and regionally flat lying sedimentary rocks are uplifted and intensely deformed. The Avak structure has no surface expression in the swampy, lake-dotted tundra of the Arctic coastal plain. The structure is covered by a thin veneer or permanently frozen Pliocene and Pleistocene rock. This means that the age of the impact took place anywhere between 95 million and 3 million years ago.