Broken Top is an extinct stratovolcano highly eroded by glaciation. It is located south of the Three Sisters group of volcanoes in the High Cascades of central Oregon. Broken Top is about 20 miles (32 km) west of Bend, Oregon. A topographical summit is a point on a surface which is higher in elevation than all points immediately adjacent to it. ... State nickname: Beaver State Official languages None Capital Salem Largest city Portland Governor Ted Kulongoski (D) Senators Ron Wyden (D) Gordon Smith (R) Area  - Total  - % water Ranked 9th 255,026 km² 2. ... The most general definition of a mountain range is a group of mountains bordered by lowlands. ... Mount Adams in Washington The Cascade Range is a mountainous region famous for its chain of tall volcanoes called the High Cascades that run north-south along the west coast of North America from British Columbia to the Shasta Cascade area of northern California. ... Map of Earth showing lines of latitude (horizontally) and longitude (vertically); large version (pdf) The geographic (earth-mapping) coordinate system expresses every horizontal position on Earth by two of the three coordinates of a spherical coordinate system which is aligned with the spin axis of the Earth. ... Example of a topographic map with contour lines Topographic maps, also called contour maps, topo maps or topo quads (for quadrangles), are maps that show topography, or land contours, by means of contour lines. ... The United States Geological Survey (USGS) is a scientific agency of the United States government. ... Mountains can be characterized in several ways. ... Stratovolcano Lanín in the border between Argentina and Chile. ... The geologic time scale is used by geologists and other scientists to describe the timing and relationships between events that have occurred during the history of the Earth. ... The Pleistocene Epoch is part of the geologic timescale. ... Eruption redirects here. ... In climbing, a first ascent (FA) is the first climb to reach the top of a mountain, or the first to follow a particular climbing route. ... Southern and northern Mount Everest climbing routes as seen from the International Space Station. ... Stratovolcano Lanín in the border between Argentina and Chile. ... The Three Sisters are three volcanic peaks of the Cascade Range, located near the town of Sisters, Oregon. ... Bend is a city located in Deschutes County, Oregon, United States. ...

Geology

Pleistocene eruptions originally created a broad shield of basaltic andesite. Intermittently, more silicic magma was erupted, ranging from andesite to dacite to rhyodacite. Intrusive dikes and pyroclastic flow deposits can also be found in the layers of Broken Top's flanks. Ice Age glaciers have carved into the volcano on three sides, exposing its internal structure. The Pleistocene Epoch is part of the geologic timescale. ... A sample of andesite (dark groundmass) with amygdaloidal vesicules filled with zeolite. ... A sample of andesite (dark groundmass) with amygdaloidal vesicules filled with zeolite. ... Gray, red, black, altered white/tan, flow-banded pumice dacite Dacite is a high-silica igneous, volcanic rock. ... BOOOOOOOOYAAAAAAAA!!!!!!!!!!! ... A dike in geology refers to a tabular intrusive igneous body. ... Pyroclastic flows sweep down the flanks of Mayon Volcano, Philippines, in 1984 Pyroclastic flows are a common and devastating result of some volcanic eruptions. ...

See also

• High Cascades
• Mount Rainier
• Mount Baker
• Mount Adams
• Glacier Peak
• Mount Hood
• Mount Shasta
• Crater Lake

Mount Adams in Washington The Cascade Range is a mountainous region famous for its chain of tall volcanoes called the High Cascades that run north-south along the west coast of North America from British Columbia to the Shasta Cascade area of northern California. ... Mount Rainier is a stratovolcano located 54 miles (87 km) southeast of Seattle, Washington, in the United States. ... Mount Baker (elevation 10,778 feet, 3285m) is a stratovolcano of ice-clad andesite in the Cascades of Washington State in the United States about 30 miles (50km) due east of the city of Bellingham, Whatcom County. ... Mount Adams is a stratovolcano in the Cascade Range and the second highest mountain in the Pacific Northwest of the United States (Mount Rainier is the tallest). ... Glacier Peak is the most remote of the five active volcanoes in Washington. ... Mount Hood is a dormant stratovolcano in northern Oregon, in the Pacific Northwest region of the United States. ... Mount Shasta, (formerly known as Mt. ... This page describes the geological feature. ...

External links

• Broken Top at Summitpost.org
• Broken Top at Peakbagger.com
• CVO Menu - Broken Top