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.
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.
Source: Wikipedia "Crack in the Ground" · CC BY-SA 4.0
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