Former lava dam in the Grand Canyon of Arizona
Prospect Dam is a former lava dam in the Grand Canyon of Arizona, United States. It was the oldest and tallest of several former lava dams in the Grand Canyon.[1] It was formed about 1.2 million years ago as lava flowed down the walls of the Grand Canyon, and temporarily stopped the flow of the Colorado River.[2]
References
36°11′29″N 113°02′50″W / 36.1914°N 113.0472°W / 36.1914; -113.0472