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Nov 5, 2023 · Shastina was formed mainly between 9,700 and 9,400 years; the Hotlum cone, which forms the summit and the north and northwest slopes of Shasta, may overlap Shastina in age, but most of the Hotlum cone is probably younger.
About 300,000 to 360,000 years ago, these two plates were subducted, or pushed beneath the western edge of the North American Plate and created a volcanic mountain that is now Mount Shasta Volcano in California.
The extensively eroded Sargents Ridge (right of center), on the south side of Mount Shasta, is a remnant of the oldest of four major edifices that were constructed following the collapse of ancestral Mount Shasta. The Sargents Ridge cone formed during the Pleistocene, less than 250,000 years ago.
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Mount Shasta consists of four overlapping volcanic cones which have built a complex shape, including the main summit and the prominent satellite cone of 12,330 feet (3,758 meters), Shastina, which has a visibly conical form. Mount Shasta's surface is relatively free of deep glacial erosion except, paradoxically, for its south side where Sergeants R...
During the last 10,000 years, Shasta has, on average, erupted every eight hundred years, but in the past 4,500 years the volcanohas erupted an average of every six hundred years. The last significant eruption on Shasta may have occurred two hundred years ago. Mount Shasta can release volcanic ash, pyroclastic flows or dacite and andesite lava. Its ...
The oldest human habitation in the area dates to about seven thousand years ago, and by about five thousand years ago, there was substantial human habitation in the surrounding area. At the time of Euro-American contact in the 1820s, the Native American tribes who lived within view of Mount Shasta included the Shasta, Okwanuchu, Modoc, Achomawi, At...
Many faiths have been attracted to Shasta over the years—more than to any other Cascade volcano. Mount Shasta and Dunsmuir, small towns near Shasta's western base, are focal points for many of these, which range from a Buddhist monastery (Shasta Abbey, founded by Houn Jiyu-Kennett in 1971) to modern-day Native American rituals. As reported in the d...
The summer climbing season on Mount Shasta runs from late April until October, although many attempts are made in the winter. Avalanche Gulch Route is one of the most popular and climbed routes in the United States with an estimated 15,000 climbers attempting the summit annually. With 17 established routes, each with variations, there is climbing a...
Harris, Stephen L. Fire Mountains of the West: The Cascade and Mono Lake. Mountain Press Pub. Co., 2005. ISBN 087842511XMiller, Joaquin. Life Amongst the Modocs: Unwritten History. Berkeley, CA: Heyday Books, 1996. ISBN 0930588797Orr, Elizabeth L., and William N. Orr. Geology of the Pacific Northwest. New York: The McGraw-Hill Companies, 1996. ISBN 0070480184Selters, Andrew and Michael Zanger. The Mt. Shasta Book: A Guide to Hiking, Climbing, Skiing, and Exploring the Mountain and Surrounding. Wilderness Press, 2006. ISBN 089997404XAll links retrieved October 25, 2018. 1. The Mount Shasta Collection– College of the Siskiyous Library 2. Mount Shastaat Summit Post 3. Mount Shastaat Peak Bagger 4. Mount Shasta– Bivouac.com - Canadian Mountain Encyclopedia
Sep 21, 2022 · The ancient tube extends over a mile underground and was formed by molten lava passing through tubes in older, hardened lava. The entrance, barely visible among the high desert plants that have taken root at the base of Mt Shasta, is a gaping foreboding hole that leads deep into the ground.
Aug 10, 2020 · Mount Shasta, a 400 km 3 volcano in northern California (United States), is the most voluminous stratocone of the Cascade arc. Most Mount Shasta lavas vented at or near the present summit; relatively smaller volumes erupted from scattered vents on the volcano’s flanks. An apron of pyroclastic and debris flows surrounds it.
