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23 Οκτ 2023 · 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.
Mount Mazama, the volcano that created the caldera, erupted and collapsed about 7,700 years ago. Later, smaller eruptions left behind cone-shaped hills, called cinder cones, on the floor of the caldera. The tallest cinder cone is Wizard Island. Pine and fir trees grow around Crater Lake.
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.
Mount Mazama formed as a group of overlapping volcanic edifices such as shield volcanoes and small composite cones, becoming active intermittently until its climactic eruption 7,700 years ago.
Crater Lake National Park has a fascinating history. Created by the explosion of Mt. Mazama 7,700 years ago, Crater Lake has long inspired reverence and wonder. Here’s a brief explanation how it all took place.
Crater Lake is located within a huge volcanic caldera in the Cascade Range of southwestern Oregon. The caldera was formed when the magma underneath a volcano drained away.
Mount Mazama is located in the southern part of the Cascade Range, about sixty miles north of the Oregon-California state line. It holds Crater Lake ( giiwas in the Klamath language), at 1,943 feet the deepest freshwater body of water in the United States.
