Geologic map of the Gulkana B-1 quadrangle, south-central Alaska
Book
·
OSTI ID:7003950
The quadrangle includes the Capital Mountain Volcano and the northern part of Mount Sanford Volcano in the Wrangell Mountains of south-central Alaska. The Capital Mountain volcano is a relatively small, andesitic shield volcano of Pleistocene age, which contains a 4-km-diameter summit caldera and a spectacular post-caldera radial dike swam. Lava flows from the younger Pleistocene Mount Sanford Volcano overlap the south side of the Capital Mountain Volcano. Copper-stained fractures in basaltic andesite related to a dike-filled rift of the North Sanford eruptive center are the only sign of mineralization in the quadrangle. Rock glaciers, deposits of Holocene and Pleistocene valley glaciers and Pleistocene Copper River basin glaciers mantle much of the volcanic bedrock below elevations of 5,500 ft.
- OSTI ID:
- 7003950
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
58 GEOSCIENCES
580000* -- Geosciences
ALASKA
BASALT
CENOZOIC ERA
FEDERAL REGION X
GEOLOGIC AGES
GEOLOGIC STRUCTURES
GEOLOGIC SURVEYS
GLACIERS
IGNEOUS ROCKS
MAPS
NATIONAL ORGANIZATIONS
NORTH AMERICA
PLEISTOCENE EPOCH
QUATERNARY PERIOD
RESEARCH PROGRAMS
ROCKS
SEDIMENTARY BASINS
SURVEYS
US DOI
US ORGANIZATIONS
USA
VOLCANIC ROCKS
VOLCANOES
580000* -- Geosciences
ALASKA
BASALT
CENOZOIC ERA
FEDERAL REGION X
GEOLOGIC AGES
GEOLOGIC STRUCTURES
GEOLOGIC SURVEYS
GLACIERS
IGNEOUS ROCKS
MAPS
NATIONAL ORGANIZATIONS
NORTH AMERICA
PLEISTOCENE EPOCH
QUATERNARY PERIOD
RESEARCH PROGRAMS
ROCKS
SEDIMENTARY BASINS
SURVEYS
US DOI
US ORGANIZATIONS
USA
VOLCANIC ROCKS
VOLCANOES