Broken top

Broken top
The summit of the Broken Top
height	2797  m
location	Oregon , USA
Mountains	Cascade chain
Coordinates	44 ° 4 '58 "  N , 121 ° 41' 59"  W Coordinates: 44 ° 4 '58 "  N , 121 ° 41' 59"  W
Type	Stratovolcano
Age of the rock	Pleistocene

Broken Top (English broken peak ) is a stratovolcano in the state of Oregon , USA . It is located 5 km southeast of the South Sister and about 32 km west of the town of Bend in Deschutes County .

geology

In the Pleistocene , a broad shield was originally basaltic andesite . Periodically, eruptions of magma richer in silicon dioxide , including andesite , dacite and rhyodacite, increased . The latter is a volcanic rock similar to both dacite and rhyolite . Dykes and deposits of pyroclastic currents can be found on the slopes of the volcano . Ice age glaciers caused severe erosion on the mountain, so that the crater can already be seen from outside the summit area.

Web links

• Summitpost.org about Broken Top (english)
• Broken Top on Peakbagger.com (English)
• Link collection of USGS Cascades Volcano Observatory (English)