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Olympus Mons is the highest known volcano and mountain in the Solar System. It is located on the planet Mars at approximately 18°N 133°W / 18°N 133°W / 18; Since the late 19th century—well before space probes confirmed its identity as a mountain—Olympus Mons was known to astronomers as the albedo feature , Nix Olympica ...
Mount Rainier [a] (/ r eɪ ˈ n ɪər / ray-NEER), also known as Tahoma, is a large active stratovolcano in the Cascade Range of the Pacific Northwest in the United States. The mountain is located in Mount Rainier National Park about 59 miles (95 km) south-southeast of Seattle. [9]
It is a shield volcano that overlays a more ancient shield volcano named Little Brother. [43] North Sister is 5 mi (8 km) wide, [ 43 ] and its summit elevation is 10,090 ft (3,075 m). [ 4 ] [ 5 ] Consisting primarily of basaltic andesite , it has a more mafic composition than the other two volcanoes. [ 44 ]
Considered "brother and sister" mountains, the two volcanoes are approximately 50 miles (80 km) from Mount Rainier, the highest of the Cascade volcanoes. Mount Hood, the nearest major volcanic peak in Oregon, is 60 miles (100 km) southeast of Mount St. Helens. Mount St. Helens is geologically young compared with the other major Cascade volcanoes.
Civil defense personnel are on high alert, blocking access to the road leading to the mountain, and flying in a helicopter over the l AP PHOTOS: Rivers and fountains of red-gold volcanic lava ...
The mountain's highest point, named "Wagagai", is located entirely within Uganda. [ 1 ] [ 6 ] Although there is no verifiable evidence of its earliest volcanic activity, geologists estimate that Mount Elgon is at least 24 million years old, making it the oldest known extinct volcano in East Africa . [ 7 ]
Tuff Canyon: volcanoes erupted 30 million years ago and expelled basalt lava rocks and hardened volcanic ash. Davis Mountains: 35 million years old and formed by magma from two volcanic centers.
The mountain is considered sacred by the Navajo. Agathla Peak is an eroded volcanic plug consisting of volcanic breccia cut by dikes of an unusual igneous rock called minette . It is one of many such volcanic diatremes that are found in Navajo country of northeast Arizona and northwest New Mexico.