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Mount Mazama originally had an elevation of 12,000 feet (3,700 m), but following its climactic eruption this was reduced to 8,157 feet (2,486 m). Crater Lake is 1,943 feet (592 m) deep, the deepest freshwater body in the U.S. and the second deepest in North America after Great Slave Lake in Canada.
31 Οκτ 2023 · By about 30,000 years ago, Mount Mazama began to generate increasingly explosive eruptions and thick flows of silica-rich rhyodacite lava. The change to more explosive and silica-rich eruptions was an outward sign that a large volume of silicic magma had begun to accumulate deep beneath the volcano.
23 Οκτ 2023 · The massive volcano erupted violently 7,700 years ago, accompanied by collapse of the entire upper half of the edifice. Prior to its climactic eruption Mount Mazama had a summit elevation of about 3,700 m (12,000 ft). The present high point is Mount Scott at 2,721 m (8929 ft), 3 km (about 2 mi) east of the caldera rim.
30 Οκτ 2023 · The climactic eruption of Mount Mazama devastated the terrain for tens of kilometers from the volcano, sent pyroclastic flows as far as 70 km (43 mi) down every valley heading on the volcano, and produced ash fall throughout much of the Pacific Northwest and parts of southern Canada.
1 Νοε 2006 · The eruptive and intrusive history reflects competition between (1) crystallization driven by degassing and hydrothermal cooling and (2) thermal input from a regional magma flux focused at Mazama.
3 Μαΐ 2024 · Mount Mazama began to form half a million years ago, experiencing numerous large eruptions which caused the mountain to grow over time. The volcano is estimated to have stood at over 12,000 feet tall before its final cataclysmic eruption, which today would make it the 4th largest volcano in the Cascades, behind Mt. Adams (Crater Lake, 2001, p. 1).
6 Δεκ 2022 · Mount Mazama, although its presence across the landscape lacks an exposed summit, is ranked 17th among the 161 potentially most dangerous volcanoes. About 4,800 years ago, a viscous rhyodacite dome nearly breached the lake surface. This is the youngest eruption product that has yet been recognized.
