Geology and History
Geology and History
Geologic history of the Long Valley, Mono Basin region.
Geology and History of Long Valley Caldera
Geology and History of Long Valley Caldera
Geology and History of Long Valley Caldera
Geology and History of Long Valley Caldera
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Vertical columns of volcanic rock at Devils Postpile National Monument
A spectacular display of a columnar-jointed basalt flow.
Geologic history of the Long Valley, Mono Basin region
Geologic history of the Long Valley, Mono Basin region.
Possible eruption sequence for the Long Valley-Mono Lake area
Possible eruption sequence for the Long Valley-Mono Lake area.
Long-term outlook for volcanic activity in Long Valley caldera
The area of eastern California that includes the Long Valley Caldera and the Mono-Inyo Craters volcanic chain has a long history of geologic activity that includes both earthquakes and volcanic eruptions. This activity is likely to continue long into the future.
Bishop Tuff in Long Valley Caldera, California
The Bishop Tuff refers to the deposits of ash and pumice ejected during the enormous eruption that created Long Valley Caldera.
Features of the Long Valley Caldera
The broad depression of Long Valley Caldera that we see today is much shallower and a little larger in diameter than it was immediately after its formation about 760,000 years ago.
Resurgent Dome in the Long Valley Caldera, California
The resurgent dome is a broad area of the central caldera floor that was pushed upward within 100,000 years or less of the caldera-forming eruption 760,000 years ago.
Mammoth Mountain
Mammoth Mountain is a 3,369-m (11,053-ft) high volcano lies west of the structural rim of the caldera and is considered to represent a magmatic system distinct from Long Valley Caldera and the Mono-Inyo Craters.
Post-caldera flows and domes, Long Valley Caldera, California
Since the enormous explosive eruption formed the caldera about 760,000 years ago, hundreds of smaller eruptions have partially filled the initially deep depression.
Hot Creek Geologic Site, Long Valley, California
Hot Creek is the lower reach of Mammoth Creek where several vigorous hot springs discharge hot water to the surface; the largest springs discharge subaqueously into the stream.
Cinder Cones in the Long Valley Area, California
Several small cinder cones are located on the floor and rim of Long Valley caldera.
Faults and fissures in the Long Valley Area, California
The area surrounding Long Valley caldera and the Mono-Inyo Craters volcanic chain is cut by a complicated mix of dozens of major north-northwest trending faults and down-faulted blocks called "grabens."