Lava flows are natural features in the Sonoran Desert, formed by volcanic activity millions of years ago.

The Sonoran Desert has many areas shaped by volcanic activity, especially in places like the Pinacate Biosphere Reserve. Lava flows, formed by the eruption of volcanic material, create rocky, uneven landscapes. These flows can be seen throughout the desert, and over time, they have shaped the terrain by creating rugged rock formations. Some of these areas remain barren, with sparse vegetation due to the harsh environment. Lava flows are important in shaping the desert’s unique geological structure and influencing its plant and animal life.