Big Hole is a large

maar A maar is a broad, low-relief volcanic crater caused by a phreatomagmatic eruption (an explosion which occurs when groundwater comes into contact with hot lava or magma). A maar characteristically fills with water to form a relatively shallow ...

(explosion crater) in the

Fort Rock basin A fortification (also called a fort, fortress, fastness, or stronghold) is a military construction designed for the defense of territories in warfare, and is used to establish rule in a region during peacetime. The term is derived from Lati ...

of Lake County, central

Oregon Oregon ( , ) is a U.S. state, state in the Pacific Northwest region of the United States. It is a part of the Western U.S., with the Columbia River delineating much of Oregon's northern boundary with Washington (state), Washington, while t ...

, northeast of

Crater Lake Crater Lake ( Klamath: ) is a volcanic crater lake in south-central Oregon in the Western United States. It is the main feature of Crater Lake National Park and is a tourist attraction for its deep blue color and water clarity. T ...

, near Oregon Route 31. It is approximately 6000 ft (1820 m) across and deep. It is close to another smaller, but less-eroded maar crater,

Hole-in-the-Ground Hole-in-the-Ground is a large maar (volcanic explosion crater) in the Fort Rock–Christmas Lake Valley basin of Lake County, central Oregon, northeast of Crater Lake, near Oregon Route 31. It is about across, a little longer N-S than E-W. ...

References

External links

* * Maars of Oregon Landforms of Lake County, Oregon Volcanoes of Oregon {{US-geology-stub

See also

References

External links