Crater Lake | U.S. Geological Survey - USGS.gov
Crater Lake partly fills one of the most visually spectacular calderas of the world, an 8-by-10-km (5-by-6-mi) basin more than 1 km (0.6 mi) deep formed by collapse of the volcano known as Mount Mazama during a series of explosive eruptions about 7,700 years ago.
Eruption History for Mount Mazama and Crater Lake Caldera
2023年10月31日 · Mount Mazama was formed as a succession of overlapping cones and shields during a period of relatively continuous volcanic activity that lasted nearly half a million years, from about 420 to 40 ka. The first eruptions built Mount Scott, located just east of Crater Lake.
Mount Mazama and Crater Lake: Growth and Destruction of a …
Decades of detailed scientific studies of Mount Mazama and new maps of the floor of Crater Lake reveal stunning details of the volcano’s eruptive history and identify potential hazards from future eruptions and earthquakes.
Geology and History Summary for Mount Mazama and Crater Lake
2023年10月23日 · Mount Mazama is one of the major volcanoes of the Cascades Arc. Crater Lake is located within the collapsed caldera of Mount Mazama on the crest of the Cascade Range in southern Oregon about 90 km (55 mi) north of the city of Klamath Falls and about 100 km (60 mi) northeast of Medford.
Geology of Crater Lake National Park | U.S. Geological Survey
Stratovolcanoes, also called composite volcanoes, tend to have a steep-sided conical form and highly explosive eruptions. Earlier eruptions built Mount Scott, which lies east of Crater Lake. As time continued, volcanoes began growing to the west building as layers of lava flows and pyroclastic deposits.
Future Eruptions Around Crater Lake | U.S. Geological Survey
2023年10月23日 · The long history of volcanism at Mount Mazama, the volcano that houses Crater Lake, suggests that this volcanic center will be active in the future. Future eruptions will likely occur within the caldera and probably beneath the water's surface.
Post-Caldera Volcanism and Crater Lake | U.S. Geological Survey
2023年10月29日 · Since the climactic eruption of Mount Mazama, “postcaldera volcanism,” has been confined within the caldera. Most of the volcanic products are hidden from view beneath Crater Lake, but submersible and sonar studies gave scientists an eye beneath the water to the surface of lake floor.
Caldera or crater…what’s the difference? | U.S. Geological Survey
2024年1月8日 · The top of the Mazama volcano collapsed into the emptied magma chamber, leaving a large surface depression that eventually filled with rainwater and became what we know today as Crater Lake. Yes, rather confusingly, the landform that defines Crater Lake is a caldera.
Volcanic Hazards for the Crater Lake Region
2023年10月31日 · Volcano hazards at Crater Lake fall into two main categories: 1) eruptions within the caldera, reflecting reawakening of the Mazama system, where Crater Lake itself will play an important role in determining the hazardous potential, and 2) eruptions from new vents on the flanks or in the surrounding region.
Geology and History | U.S. Geological Survey - USGS.gov
The long history of volcanism at Mount Mazama, the volcano that houses Crater Lake, suggests that this volcanic center will be active in the future. Future eruptions will likely occur within the caldera and probably beneath the water's surface.