EarthChem Home
Decade Home
About EarthChem
Overview
News
About DECADE
Help
Login
Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Duncan Canal
The Castle Islands (center) lie within Duncan Canal on Kupreanof Island in SE Alaska, as seen looking NW from the Lindenberg Peninsula. The Castle Islands mostly consist of Tertiary sedimentary and volcanic rocks, but the northernmost island (far-right side of the island group) contains Quaternary basalts. Pahoehoe and aa lava flows are also found at the south end of Kupreanof Island, where they overlie glacial till. Photo by Susan Karl (Alaska Volcano Observatory, U S Geological Survey).
Volcano Number:
315050
Volcano Name:
Duncan Canal
Country:
United States
Volcano Type:
Volcanic field
Elevation:
15m
Tectonic Setting:
Subduction zone / Continental crust (> 25 km)
Pop. within 30km:
60
Pop. within 100km:
7558
Latitude:
56.5
Longitude:
-133.1
Details
Hide
Conspicuous fresh-looking pahoehoe and aa lava flows overlie glacial till at Kupreanof Island in the central panhandle of SE Alaska. Quaternary basaltic lava flows of Holocene and/or Pleistocene age up to 10 m thick form several broad flat-lying peninsulas and scattered outcrops on the shores of Sumner Strait at the southern end of Kupreanof Island (Brew et al. 1985). On a peninsula in Kah Sheets Bay a basaltic flow depositionally overlies till of the youngest glaciation, and youthful-looking flows are exposed along a broad 12-km-wide front westward toward Douglas Bay. Two probable vents are found to the north within Mesozoic and Paleozoic rocks at the northern end of the Castle Islands in the Duncan Canal fault zone, and at Indian Point the flows contain inclusions of picrite. At High Castle Island, the basaltic flows are columnar-jointed and overlie planar to cross-bedded coarse sandstone and poorly sorted volcaniclastic conglomerate. Basaltic flows in the Duncan Canal area are both subaerial and submarine.
Download XLS
Eruption Data from the Global Volcanism Program of the Smithsonian Institution
Sorry. No erruption data found for this volcano.
Emissions Data from the Global Volcanism Program of the Smithsonian Institution
Sorry. No emissions data found for this volcano.
Data from the Earthchem Library
Sorry. No data exist for this volcano in the EarthChem Library.
Data from the Earthchem Portal
Show 177 Results
Hide Results
1
2
3
4
5
6
7
8
Next
Data from the SESAR Database
Show 2 Results
Hide Results
Data from the MaGa Database
Sorry. No data exist for this volcano in the MaGa database.
Data from UNAVCO
Show 1 Results
Hide Results
Data from USIEI
Show 1 Results
Hide Results
Data from IRIS FDSNWS
Sorry. No IRIS data found for this volcano.