Search results
Results From The WOW.Com Content Network
Map of Long Valley Caldera Early winter in Long Valley, 2017. Long Valley Caldera is a depression in eastern California that is adjacent to Mammoth Mountain.The valley is one of the Earth's largest calderas, measuring about 20 mi (32 km) long (east-west), 11 mi (18 km) wide (north-south), and up to 3,000 ft (910 m) deep.
Montgomery-Brown, an expert on the Long Valley Caldera who is now with the USGS' Cascades Volcano Observatory, said the most recent episode of increased earthquake activity in the area began in ...
It is a part of the Volcano Hazards Program of the United States Geological Survey, a scientific agency of the United States government. [ 2 ] Originally, the volcano observatory was known as the Long Valley Observatory which monitored volcanic activity east of the Sierra Nevada in Mono County, California which included Long Valley Caldera ...
The Long Valley to Mono Lake region is one of three areas in California that are in the United States Geological Survey's volcanic hazards program. [ note 2 ] [ 28 ] : 52 These areas are in the program because they have been active in the last 2,000 years and have the ability to produce explosive eruptions.
A long-quiet yet massive super volcano, dubbed the "Long Valley Caldera," has the potential to unleash a fiery hell across the planet, and the magma-filled mountain has a history of doing so.
The peak lies 20 miles (32 km) southeast of the shoreline of Mono Lake and is the highest point on the four-mile (6.4 km) long sinuous Glass Mountain Ridge. [3] [4] [5] The Glass Mountain Ridge forms the northeast boundary of Long Valley Caldera.
USGS map of the Mono Basin area, showing the Long Valley Caldera (click to see detail). In hydrothermal systems, the circulation of ground water is driven by a combination of topography and geothermal heat sources. The system in the Long Valley Caldera is recharged primarily from snowmelt in the highlands around the western and southern rims of ...
The magma source for Mammoth Mountain is distinct from those of both the Long Valley Caldera and the Inyo Craters. [ 3 ] [ 11 ] [ 12 ] Mammoth Mountain is composed primarily of dacite and rhyolite , [ 13 ] part of which has been altered by hydrothermal activity from fumaroles (steam vents).