Three Sisters
Near Bend, Oregon
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Three Sisters
Aerial view from the southeast looking north of the Three Sisters volcanoes, three mountains sparsely covered with ice and snow. From left to right the image shows South Sister, Middle Sister, and North Sister, with a black lava flow in the left foreground.
The Three Sisters, looking north
Highest point
Elevation
South 10,363 ft (3,158.5 m)[1] NAVD 88
Middle 10,052 ft (3,063.7 m)[2][3] NAVD 88
North 10,090 ft (3,075.3 m)[4][5] NAVD 88
Prominence 5,588 feet (1,703 m) (South Sister) [6]
Listing US most prominent peaks, 85th (South Sister)
Coordinates 44°06′12″N 121°46′09″WCoordinates: 44°06′12″N 121°46′09″W [7]
Geography
Three Sisters is located in Oregon
Three Sisters
Three Sisters
Location in Oregon
Location Lane and Deschutes counties, Oregon, U.S.
Parent range Cascade Range
Topo map USGS South Sister and North Sister
Geology
Age of rock Quaternary
Mountain type Complex volcano, made up of stratovolcanoes and a shield volcano
Volcanic arc Cascade Volcanic Arc
Last eruption 440 CE[8]
Climbing
Easiest route Hiking or scrambling, plus glacier travel on some routes[9]
The Three Sisters are volcanic peaks that form a complex volcano in the U.S. state of Oregon. They are part of the Cascade Volcanic Arc, a segment of the Cascade Range in western North America extending from southern British Columbia through Washington and Oregon to Northern California. Each more than 10,000 feet (3,000 m) in elevation, they are the third-, fourth- and fifth-highest peaks in Oregon. Located in the Three Sisters Wilderness at the boundary of Lane and Deschutes counties and the Willamette and Deschutes national forests, they are about 10 miles (16 km) south of the nearest town, Sisters. Diverse species of flora and fauna inhabit the area, which is subject to frequent snowfall, occasional rain, and extreme temperature variation between seasons. The mountains, particularly South Sister, are popular destinations for climbing and scrambling.
Although they are often grouped together as one unit, the three mountains have their own individual geology and eruptive history. Neither North Sister nor Middle Sister has erupted in the last 14,000 years. South Sister last erupted about 2,000 years ago and might erupt in the future, threatening life within the region. After satellite imagery detected tectonic uplift near South Sister in 2000, the United States Geological Survey improved monitoring in the immediate area.
From Wikipedia
Three Sisters
Near Bend, Oregon
Jump to navigation
Jump to search
Three Sisters
Aerial view from the southeast looking north of the Three Sisters volcanoes, three mountains sparsely covered with ice and snow. From left to right the image shows South Sister, Middle Sister, and North Sister, with a black lava flow in the left foreground.
The Three Sisters, looking north
Highest point
Elevation
South 10,363 ft (3,158.5 m)[1] NAVD 88
Middle 10,052 ft (3,063.7 m)[2][3] NAVD 88
North 10,090 ft (3,075.3 m)[4][5] NAVD 88
Prominence 5,588 feet (1,703 m) (South Sister) [6]
Listing US most prominent peaks, 85th (South Sister)
Coordinates 44°06′12″N 121°46′09″WCoordinates: 44°06′12″N 121°46′09″W [7]
Geography
Three Sisters is located in Oregon
Three Sisters
Three Sisters
Location in Oregon
Location Lane and Deschutes counties, Oregon, U.S.
Parent range Cascade Range
Topo map USGS South Sister and North Sister
Geology
Age of rock Quaternary
Mountain type Complex volcano, made up of stratovolcanoes and a shield volcano
Volcanic arc Cascade Volcanic Arc
Last eruption 440 CE[8]
Climbing
Easiest route Hiking or scrambling, plus glacier travel on some routes[9]
The Three Sisters are volcanic peaks that form a complex volcano in the U.S. state of Oregon. They are part of the Cascade Volcanic Arc, a segment of the Cascade Range in western North America extending from southern British Columbia through Washington and Oregon to Northern California. Each more than 10,000 feet (3,000 m) in elevation, they are the third-, fourth- and fifth-highest peaks in Oregon. Located in the Three Sisters Wilderness at the boundary of Lane and Deschutes counties and the Willamette and Deschutes national forests, they are about 10 miles (16 km) south of the nearest town, Sisters. Diverse species of flora and fauna inhabit the area, which is subject to frequent snowfall, occasional rain, and extreme temperature variation between seasons. The mountains, particularly South Sister, are popular destinations for climbing and scrambling.
Although they are often grouped together as one unit, the three mountains have their own individual geology and eruptive history. Neither North Sister nor Middle Sister has erupted in the last 14,000 years. South Sister last erupted about 2,000 years ago and might erupt in the future, threatening life within the region. After satellite imagery detected tectonic uplift near South Sister in 2000, the United States Geological Survey improved monitoring in the immediate area.
From Wikipedia