Green Mountain Campground

Crack in the Ground is a volcanic fissure about 2 miles (3.2 km) long with depths measuring nearly 30 feet (9 m) below ground level in Central Oregon, United States. The formation of the fissure occurred approximately between 700,000 and 12,000 years ago. The eruptions from the Four Craters Lava Field were accompanied by a slight sinking of the older rock surface, forming a shallow, graben-like s

The Squaw Ridge Lava field, also known as the East Lava Field, is a young basaltic field located in the U.S. state of Oregon southeast of Newberry Volcano. The flow erupted from the Lava Mountain shield and is likely related to the Four Craters Lava Field, both of which were created after Mount Mazama erupted.