Get our newsletter!
Check out our volcano tours on!
Volcanoes & Earthquakes - new app for Android
Volcanoes & Earthquakes - app for iPhone & iPad

Guaranteed tours:
19-26 Sep 2020: Pearl of the Aegean - Santorini - Santorini Island (Greece)
10-18 Oct 2020: From Stromboli to Etna - Sicila and Eolian Islands (Italy)
14-27 Nov 2020: Desert, salt and volcanoes - Danakil desert (Ethiopia)
: spaces available / : guaranteed / : few spaces left / : booked out

no news in this list.


Fort Rock Volcanic Field volcano

Maar(s) 1712 m / 5617 ft
Oregon, United States, 43.39°N / -121.14°W
Current status: (probably) extinct (0 out of 5) | Reports
Fort Rock Volcanic Field volcano books
Typical eruption style: unspecified
Fort Rock Volcanic Field volcano eruptions: None during the past 10,000 years
Less than few million years ago (Pleistocene) No recent earthquakes
TimeMag. / DepthDistanceLocation


A large group of tuff rings, tuff cones, and maars occupies the Fort Rock-Christmas Lake Valley basin S of Newberry volcano. The 64 x 40 km basin was occupied a Pliocene to late-Pleistocene lake, through which eruptions of basaltic magma occurred along faults cutting diagonally across the basin and adjacent highland. The volcanic field is named for Fort Rock, a spectacular wave-cut tuff ring that was breached by wave erosion. The Table Rock tuff ring and maar complex lies at the SE end of the field. Spectacular maars such as Hole-in-the-Ground and Big Hole are located near Gighway 31. Hole-in-the-Ground was formed as recently as between 13,500 and 18,000 years ago.
Source: Smithsonian / GVP volcano information

Latest satellite images

See also: Sentinel hub | Landsat 8

More on VolcanoDiscovery:

Why is there advertising on this site?
Copyrights: VolcanoDiscovery and other sources as noted.
Use of material: Most texts and images, in particular photographs, on this website are protected by copyright. Further reproduction and use of without authorization is usually not consented. If you are not sure or need licensing rights for photographs, for example for publications and commercial use, please contact us.
Home | Travel | Destinations | Volcanoes | Photos | Earthquakes | About | Glossary | News | Contact | Privacy | Imprint || Français | Deutsch
Follow us: