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Behm Canal-Rudyerd Bay description and information

BEHM CANAL-RUDYERD BAY LINKS

SAMPLES
LOCATION
FACTS
Type:Cinder cones
Most Recent Activity:
Seismically Monitored: No
Elevation: 1640 ft (500 m)
Latitude: 55.3196° N
Longitude:131.051° W
Quadrangle:Ketchikan
CAVW Number:315070
Associated Features:Painted Peak
Princess Bay cone
Nearby towns:Saxman 21 mi (34 km) SW
Ketchikan Gateway Borough 23 mi (37 km) NW
Ketchikan 24 mi (38 km) NW
Metlakatla 24 mi (39 km) SW
Anchorage 792 mi (1275 km) NW
DESCRIPTION
From Wood and Kienle (1990): "Potassic alkali olivine basalt cinder cones and columnar-jointed flows occur as separate entities in the field, which is more or less centered on the Coast Range megalineament. Minor andesite and trachyandesite flows are locally present. There are also thin patches of ash and lapilli layers. The lava flows unconformably overlie glacial-fluvial sand and silt deposits and granitic gneiss of the Coast Mountains plutonic-metamorphic complex. Glacial striations and grooves indicate that some of the flows pre-date the last glaciation, but undissected cinder cones and flow surface features indicate that most of the activity was post-glacial. Flows are locally columnar-jointed, and some tuff and breccia deposits form void-rich spires and cliffs."
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Page modified: June 12, 2014 07:20
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