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Yamsay Mountain is a large shield volcano in the Cascade Range of south-central Oregon, located about 35 miles (56 km) east of Crater Lake on the border between Klamath County and Lake County. It is part of the Cascade Volcanic Arc but is located in a mountain range 30 to 50 miles (50 to 80 km) behind the main Cascade volcanic front.
Mount Mazama (Klamath: Tum-sum-ne [5]) is a complex volcano in the western U.S. state of Oregon, in a segment of the Cascade Volcanic Arc and Cascade Range.The volcano is in Klamath County, in the southern Cascades, 60 miles (97 km) north of the Oregon–California border.
Mount Scott first erupted about 420,000 years ago and is one of the oldest volcanoes in the Mount Mazama complex. [8] [9] It erupted mainly andesitic lavas before becoming extinct in the late Pleistocene. [10] Since it was relatively far away from the main flanks of Mount Mazama, it survived the mountain's massive explosion that occurred around ...
Pali Dome is a subglacial volcano in the Pacific Ranges of the Coast Mountains in southwestern British Columbia, Canada.It is part of the Mount Cayley volcanic field and its elevation is 2,250 m (7,380 ft). [1]
Highest point; Elevation: 8,215 ft (2,504 m) NAVD 88 [1] Prominence: 3,088 ft (941 m) [2] Coordinates: 1]: Geography; Location: Klamath County, Oregon, U.S.: Parent range: Cascade Range: Topo map: USGS Aspen Lake: Geology; Rock age: 4.9-3.5 Ma [3]: Mountain type: Shield volcano: Volcanic arc: Cascade Volcanic Arc: Last eruption: Pleistocene: Climbing; Easiest route: Trail: Aspen Butte is a ...
The Cascade Arc formed during the Oligocene epoch, and by the late Miocene epoch there was a low but broad gap between the Washington segment of the arc and Cascade volcanoes in Oregon. Activity picked up during the Quaternary period in Washington, as andesitic stratovolcanoes and small, olivine basalt cinder cones and shield volcanoes erupted. [8]
The Cascade volcanoes have had more than 100 eruptions over the past few thousand years, many of them explosive eruptions. [21] However, certain Cascade volcanoes can be dormant for hundreds or thousands of years between eruptions, and therefore the great risk caused by volcanic activity in the regions is not always readily apparent.
Cinnamon Butte; Highest point; Elevation: 6,427 ft (1,959 m) NAVD 88 [1] Coordinates: 1]: Geography; Location: Douglas County, Oregon, U.S.: Parent range: Cascades: Topo map: USGS Mount Thielsen: Geology; Rock age: Holocene? [2]: Mountain type(s): Cinder cone, lava dome, volcanic field: Volcanic arc: Cascade Volcanic Arc: Last eruption: More than 6845 years ago [2]: Cinnamon Butte is a group ...