Big Hole (Oregon) Explained

Big Hole
Elevation Ft:	4613
Elevation Ref:	at the bottom^[1]
Location:	Lake County, Oregon, U.S.
Range:	Cascade Range
Coordinates:	43.4251°N -121.3134°W
Topo:	USGS Big Hole
Type:	Maar
Last Eruption:	10,000-100,000 years ago
Age:	Possibly 20,000 years^[2]

Big Hole is a large maar (explosion crater) in the Fort Rock basin of Lake County, central Oregon, northeast of Crater Lake, near Oregon Route 31. It is approximately 6000 ft (1820 m) across and 300feet deep.^[3]

It is close to another smaller, but less-eroded maar crater, Hole-in-the-Ground.

See also

• Crack in the Ground
• Hole-in-the-Ground

External links

• Web site: CVO Menu - Fort Rock and Vicinity, Oregon . Cascades Volcano Observatory . United States Geological Survey . 2002-03-06 . 2008-04-29 .
• A Field Trip to the Maar Volcanoes of the Fort Rock - Christmas Lake Valley Basin, Oregon . Heiken . G. H. . Fisher . R. V. . Peterson . N. V. . Geological Survey Circular . 838 . United States Geological Survey . 1981 . 2008-04-29 . dead . https://web.archive.org/web/20101110081903/http://www.nps.gov/history/history/online_books/geology/publications/circ/838/roadlog6.htm . 2010-11-10 .

Notes and References

1. 1138033 . Big Hole . 2008-11-13.
2. Lorenz. Volker. Some Aspects of the Eruption Mechanism of the Big Hole Maar, Central Oregon. GSA Bulletin. Geological Society of America. June 1970. 6. 81. 1823–1830. August 14, 2011. 10.1130/0016-7606(1970)81[1823:SAOTEM]2.0.CO;2.
3. Book: McArthur , Lewis A. . McArthur . Lewis L. . Oregon Geographic Names . 1928 . Seventh . 2003 . Oregon Historical Society Press . . 0-87595-278-X.