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Pavlof Sister

Stratovolkan · United States · 2142 m

The summits of Pavlof Sister (left) and Pavlof (right) rise above a roughly 1,100-m-elevation saddle. They are viewed here in 1975 from lowlands to the NW. Pavlof is darkened by recent ash deposition and has been the source of frequent eruptions in historical time. Little Pavlof, a cone on the right flank of Pavlof, was also constructed along a line of vents trending NE from Emmons Lake caldera.
The summits of Pavlof Sister (left) and Pavlof (right) rise above a roughly 1,100-m-elevation saddle. They are viewed here in 1975 from lowlands to the NW. Pavlof is darkened by recent ash deposition and has been the source of frequent eruptions in historical time. Little Pavlof, a cone on the right flank of Pavlof, was also constructed along a line of vents trending NE from Emmons Lake caldera. · Foto: Photo by Tom Miller, 1975 (Alaska Volcano Observatory, U.S. Geological Survey). · Wikimedia Commons
Tipe
Stratovolkan
Negara
United States
Wilayah
North America Volcanic Regions / Aleutian Ridge Volcanic Arc
Ketinggian
2142 m
Koordinat
55.457, -161.854
Letusan terakhir
Tidak diketahui
Kondisi tektonik
Subduction zone / Continental crust (> 25 km)
Bentuk lahan
Composite
Batuan utama
Basalt / Picro-Basalt
Ringkasan geologi

Located near the western end of the Alaska Peninsula at the end of a chain of volcanoes trending NE from Emmons Lake caldera, the symmetrical Pavlof Sister stratovolcano is somewhat more eroded than Pavlof volcano to the SW. Pavlof Sister, along with Pavlof and Little Pavlof, formed outside of the Emmons Lake caldera; these and other volcanoes inside Emmons Lake caldera are not glaciated and thus would have formed since the area was last glaciated about 15-20,000 years ago. Pavlof Sister is almost 400 m lower than Pavlof and has a sharper-peaked summit. Some sources attributed a period of intermittent eruptive activity from 1762 to 1786 CE to Pavlof Sister, but other sources consider this event to have been from Pavlof.

Ringkasan Wikipedia

Ringkasan Inggris

Pavlof Sister is a stratovolcano on the Alaska Peninsula. It is a satellite peak of Pavlof Volcano, lying directly northeast. The mountain was named by the USGS in 1929. It is considered dormant, as the volcano was reported to have last erupted between 1762 and 1786 although the event is questionable. The Alaska Volcano Observatory has the volcano alert level of Pavlof Sister set to "Unassigned", meaning the volcano is not currently monitored.

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