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Eagle Lake Field volcano

Fissure vent(s) 1652 m / 5420 ft
California, United States, 40.63°N / -120.83°W
Current status: (probably) extinct (0 out of 5) | Reports
Eagle Lake Field volcano books
Typical eruption style: unspecified
Eagle Lake Field volcano eruptions: None during the past 10,000 years
Less than few million years ago (Pleistocene) No recent earthquakes
TimeMag. / DepthDistanceLocation


The Eagle Lake volcanic field occupies the junction of the Cascades, Sierra Nevada, and Basin and Range geologic provinces, and consists of 15 cinder cones and basaltic lava flow vents within a larger Quaternary basaltic field. The vents are aligned along faults defining the Eagle Lake volcano-tectonic depression, and are the southernmost example of late Quaternary back-arc spreading in the NW Great Basin. The Brockman Flat lava flow, the largest of the younger flows, was erupted from a N-S oriented 3-km-long fissure vent along a fault that forms the west boundary of the Eagle Lake basin and created an approximately 63 km2 tube-fed flow field that extended across the Eagle Lake basin to the east side of Eagle Lake. Miller (1989) mapped four Holocene centers west of Eagle Lake; however, recent 40Ar/39Ar dating indicates that the youngest lava flows were erupted during a relatively short interval between about 130 and 125 ka that was unlikely to span more than a few thousand years (Clynne et al., 2017).
Source: Smithsonian / GVP volcano information

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