User:FluttershyIsMagic/sandbox
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Lemei Rock is a shield volcano, and part of the polygenetic Indian Heaven [4] Volcanic Field in Washington, United States. It is located midway between Mount St. Helens and Mount Adams, and dates from the Pleistocene and Holocene. It is the highest point Lemei Rock at 5,925 feet (1,806 m).
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Lemei Rock | |
---|---|
Highest point | |
Elevation | 5,925 ft (1,806 m)[1] |
Prominence | 2405 ft (733 m) |
Coordinates | 46°1′6″N 121°45′36″W[2] [3] |
Geography | |
Location | Skamania County, Washington, U.S. |
Parent range | Cascade Range |
Topo map | Lone Butte O46121a7 1:24,000 |
Geology | |
Age of rock | Pleistocene and Holocene |
Mountain type | shield volcano |
Volcanic arc | Cascade Volcanic Arc |
Last eruption | 8,200 years ago |
Climbing | |
Easiest route | Lemei Trail, Indian Heaven Trail, with rock scrambling |
Its last volcanic activity produced a large cinder cone and a voluminous lava and scoria flows about 8200 years ago.
About 60 eruptive centers lie on the 19-mile (30 km) long, N10°E-trending, Indian Heaven fissure zone. The 230 square miles (600 km2) field has a volume of about 20 cubic miles (100 km3) and forms the western part of a 770-square-mile (2,000 km2) Quaternary basalt field in the southern Washington Cascades, including the King Mountain fissure zone along which Mount Adams was built.