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)

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Typical eruption style: unspecified
Fort Rock Volcanic Field volcano eruptions: None during the past 10,000 years
Less than few million years ago (Pleistocene)

Latest nearby earthquakes

TimeMag. / DepthDistance/Location
Saturday, September 18, 2021 03:21 GMT (1 earthquake)
Sep 17, 2021 8:21 pm (GMT -7) (Sep 18, 2021 03:21 GMT)

0.3 km
40 km (25 mi)
28 Km ESE of Three Rivers, Oregon
Tuesday, September 14, 2021 15:31 GMT (1 earthquake)
Sep 14, 2021 8:31 am (GMT -7) (Sep 14, 2021 15:31 GMT)

2.9 km
37 km (23 mi)
22 Km ESE of Three Rivers, Oregon
Tuesday, September 7, 2021 05:43 GMT (1 earthquake)
Sep 6, 2021 10:43 pm (GMT -7) (Sep 7, 2021 05:43 GMT)

8.6 km
28 km (17 mi)
18 Km ESE of La Pine, Oregon


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

See also: Sentinel hub | Landsat 8
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