Mount Douglas (Alaska) - AbsoluteAstronomy.com

For other mountains by this name, see Mount Douglas
Mount Douglas
Mount Douglas can refer to:*A mountain summit:**Mount Douglas **Mount Douglas **Mount Douglas **Mount Douglas **Mount Douglas **Mount Douglas **Mount Douglas *A school:...

.

Mount Douglas is a stratovolcano

Stratovolcano

A stratovolcano, also known as a composite volcano, is a tall, conical volcano built up by many layers of hardened lava, tephra, pumice, and volcanic ash. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile and periodic, explosive eruptions...

located south of Kamishak Bay

Kamishak Bay

Kamishak Bay is a bay on the coast of Alaska in the United States.The proposed United States Navy seaplane tender USS Kamishak was named for Kamishak Bay, but the contract for the ship's construction was cancelled in 1943 before construction began.-References:...

, near the northeasternmost part of the Alaska Peninsula

Alaska Peninsula

The Alaska Peninsula is a peninsula extending about to the southwest from the mainland of Alaska and ending in the Aleutian Islands. The peninsula separates the Pacific Ocean from Bristol Bay, an arm of the Bering Sea....

. It lies in the Katmai National Park and Preserve

Katmai National Park and Preserve

Katmai National Park and Preserve is a United States National Park in southern Alaska, notable for the Valley of Ten Thousand Smokes and for its brown bears. The park covers , being roughly the size of Wales. Most of this is a designated wilderness area, including of the park...

in Kenai Peninsula Borough

Kenai Peninsula Borough, Alaska

-National protected areas:* Alaska Maritime National Wildlife Refuge ** Chiswell Islands** Tuxedni Wilderness* Chugach National Forest * Katmai National Park and Preserve ** Katmai Wilderness...

. 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

Alaska Volcano Observatory

The Alaska Volcano Observatory is a joint program of the United States Geological Survey, the Geophysical Institute of the University of Alaska Fairbanks, and the State of Alaska Division of Geological and Geophysical Surveys...

currently rates Douglas as Level of Concern Color Code Not Assigned.

The volcano has a warm and highly acidic crater lake

Crater lake

A crater lake is a lake that forms in a volcanic crater or caldera, such as a maar; less commonly and with lower association to the term a lake may form in an impact crater caused by a meteorite. Sometimes lakes which form inside calderas are called caldera lakes, but often this distinction is not...

approximately 160 m (525 ft) wide. In 1992, the lake had a temperature of 21°C and a pH

In chemistry, pH is a measure of the acidity or basicity of an aqueous solution. Pure water is said to be neutral, with a pH close to 7.0 at . Solutions with a pH less than 7 are said to be acidic and solutions with a pH greater than 7 are basic or alkaline...

of 1.1. At the north flank of the volcano unglaciated and relatively uneroded lava flows are found. The last eruption was considered to have occurred during the Holocene

Holocene

The Holocene is a geological epoch which began at the end of the Pleistocene and continues to the present. The Holocene is part of the Quaternary period. Its name comes from the Greek words and , meaning "entirely recent"...

(Nye et al.,1998).

See also