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The Global Volcanism Program has no activity reports for Sanford.
The Global Volcanism Program has no Weekly Reports available for Sanford.
The Global Volcanism Program has no Bulletin Reports available for Sanford.
Massive dissected Mount Sanford shield volcano is one of the highest Quaternary volcanoes in the United States. The 4949-m-high, glacier-covered andesitic volcano towers above the Copper River and has a broad, bulbous top that is surrounded by massive, glacially excavated cirques, most prominent on the SW and SE sides of the summit. The upper part of this little-studied, ice-covered volcano is possibly of Holocene age (Richter, in Wood and Kienle, 1990) and developed on a base of three coalescing andesitic shield volcanoes south, NW and NNW of the summit that began to form about 900,000 years ago. A massive mid-Pleistocene rhyolitic lava flow from a NE-flank vent traveled more than 18 km to the NE. Basaltic lava flows that were erupted from a NE-flank rift zone about 320,000 years ago mark the latest radiometrically dated activity from Mount Sanford.
The Global Volcanism Program is not aware of any Holocene eruptions from Sanford. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Sanford page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.
|This view, across the Copper River to the SE, shows 4949-m-high Mount Sanford (left) and 4317-m-high Mount Wrangell (right), two massive andesitic shield volcanoes. The dissected Sanford shield volcano has a broad, bulbous top that is surrounded by steep-walled glacial cirques. Most of the volcano formed in the Pleistocene, but part of the summit region may be of Holocene age. Eruptive activity at the younger, less-dissected Wrangell volcano has continued into historical time.
Photo by Donald Richter (Alaska Volcano Observatory, U.S. Geological Survey).
The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title.
IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior..
Mendenhall W C, 1905. Geology of the central Copper River region, Alaska.. U S Geol Surv Prof Pap, 41: 54-62.
Richter D H, Rosenkrans D S, Steigerwald M J, 1995. Guide to the volcanoes of the western Wrangell Mountains, Alaska--Wrangell-St. Elias National Park and Preserve. U S Geol Surv Bull, 2072: 1-31.
Winkler G R, 2000. A geologic guide to Wrangell--Saint Elias National Park and Preserve, Alaska. U S Geol Surv Prof Pap, 1616: 1-166.
Wood C A, Kienle J (eds), 1990. Volcanoes of North America. Cambridge, England: Cambridge Univ Press, 354 p.