Mount Douglas is a

stratovolcano A stratovolcano, also known as a composite volcano, is a typically conical volcano built up by many alternating layers (strata) of hardened lava and tephra. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile with ...

located south of Kamishak Bay, near the northeasternmost part of the

Alaska Peninsula The Alaska Peninsula (also called Aleut Peninsula or Aleutian Peninsula, ; Sugpiaq language, Sugpiaq: ''Aluuwiq'', ''Al'uwiq'') is a peninsula extending about to the southwest from the mainland of Alaska and ending in the Aleutian Islands. T ...

. It lies in the

Katmai National Park and Preserve Katmai National Park and Preserve is a List of national parks of the United States, United States national park and National preserve, preserve in southwest Alaska, notable for the Valley of Ten Thousand Smokes and for its Alaska Peninsula brown ...

in Kenai Peninsula Borough. The mountain was officially named in 1906 after nearby Cape Douglas based on a 1904 report by USGS geologist G. C. Martin. The

Alaska Volcano Observatory The Alaska Volcano Observatory (AVO) is a joint program of the United States Geological Survey (USGS), the Geophysical Institute of the University of Alaska Fairbanks (UAFGI), and the State of Alaska Division of Geological and Geophysical Surv ...

currently rates Douglas as Level of Concern Color Code Not Assigned. The volcano has a warm and highly acidic

crater lake Crater Lake ( Klamath: ) is a volcanic crater lake in south-central Oregon in the Western United States. It is the main feature of Crater Lake National Park and is a tourist attraction for its deep blue color and water clarity. T ...

approximately 160 m (525 ft) wide. In 1982, the lake had a temperature of 21 °C and a pH of 1, and temperatures of 114-118°C were measured in 1991. At the north flank of the volcano unglaciated and relatively uneroded lava flows are found. The last eruption is not known, but probably occurred during the

Holocene The Holocene () is the current geologic time scale, geological epoch, beginning approximately 11,700 years ago. It follows the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene to ...

. __TOC__

References

Other Sources

Volcanoes of the Alaska Peninsula and Aleutian Islands-Selected Photographs

Mt. Douglas - Alaska Volcano Observatory
{{DEFAULTSORT:Douglas, Mount Volcanoes of Kenai Peninsula Borough, Alaska Stratovolcanoes of Alaska Two-thousanders of the United States Volcanic crater lakes Katmai National Park and Preserve Aleutian Range Mountains of Kenai Peninsula Borough, Alaska

See also

References

Other Sources