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Mount Sanford is a shield volcano which lies in eastern Alaska near the Copper River and is one of the tallest volcanoes in North America. It is mainly composed of andesite, and is an ancient peak, being mostly of Pleistocene age, although some of the upper parts of the mountain may be of Holocene age. The mountain was named in 1885 by Lt. Henry T. Allen of the U.S. Army after the Sanford family (Allen was a descendant of Reuben Sanford). Image File history File links Download high resolution version (1024x697, 161 KB) Picture of Mount Sanford in Alaska. ...
A topographical summit is a point on a surface which is higher in elevation than all points immediately adjacent to it. ...
Official language(s) English Capital Juneau Largest city Anchorage Area - Total - Width - Length - % water - Latitude - Longitude Ranked 1st 663,267 mi² / 1 717 854 km² 808 mi / 1300 km 1,479 mi / 2380 km 13. ...
The most general definition of a mountain range is a group of mountains bordered by lowlands. ...
Wrangell Mountains The Wrangell Mountains are a high mountain range in southeast Alaska in the United States and the southwest Yukon Territory in Canada. ...
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. ...
Mountains can be characterized in several ways. ...
Mauna Kea, a shield volcano, on the Island of Hawai‘i with a light dusting of snow. ...
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 Holocene epoch is a geological period that extends from the present back about 10,000 radiocarbon years. ...
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. ...
Mauna Kea, a shield volcano, on the Island of Hawai‘i with a light dusting of snow. ...
Official language(s) English Capital Juneau Largest city Anchorage Area - Total - Width - Length - % water - Latitude - Longitude Ranked 1st 663,267 mi² / 1 717 854 km² 808 mi / 1300 km 1,479 mi / 2380 km 13. ...
The Copper River or Atna River is a river, approximately 300 mi (480 km) long, in southeast Alaska in the United States. ...
World map showing North America A satellite composite image of North America. ...
A sample of andesite (dark groundmass) with amygdaloidal vesicules filled with zeolite. ...
The Pleistocene Epoch is part of the geologic timescale. ...
The Holocene epoch is a geological period that extends from the present back about 10,000 radiocarbon years. ...
The south face of the volcano, at the head of the Sanford Glacier, rises 8,000 ft in one mile (2,400 m in 1,600 m) resulting in one of the steepest gradients in North America.
The mountain first began developing 900,000 years ago, when it began growing on top of three smaller shield volcanoes that had coalesced. Two notable events in the mountain's history include a large lava flow which traveled some 18 km to the north east of the peak, and a flow erupted from a rift zone on the flank of the volcano some 320,000 years ago, which was basaltic in nature, marking the most recent dated activity of the volcano. The flow was dated using radiometric methods. In telecommunication and physics, radiometry is the science of radiation measurement. ...
Sources
- Siebert, L. and T. Simkin (2002-). Volcanoes of the World: an Illustrated Catalog of Holocene Volcanoes and their Eruptions. Smithsonian Institution, Global Volcanism Program Digital Information Series, GVP-3. URL: http://www.volcano.si.edu/world/
- Alaska Volcano Observatory
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