Trident 44000 yBP
Start: 44000 yBP ± 12000 Years [1]
Event Type: Effusive
- Lava flow [1]
Description: From Hildreth and others (2003): "The K-Ar age of 44+/-12 ka measured for the thick andesitic lava flow that forms the crest of the north ridge (fig. 8 [in original text]) supports our stratigraphic and morphologic inference that West Trident is the youngest of the prehistoric centers in the Trident group."
"For West Trident, which banks against Trident I, a 70-m-thick andesitic lava flow capping the north ridge gave a K-Ar age of 44+/-12 ka. An attempt to date the summit lava of West Trident (fig. 8 [in original text]) failed to yield sufficient radiogenic Ar to provide a meaningful age, supporting our field inference that it is still younger than the dated lava flow."
"For West Trident, which banks against Trident I, a 70-m-thick andesitic lava flow capping the north ridge gave a K-Ar age of 44+/-12 ka. An attempt to date the summit lava of West Trident (fig. 8 [in original text]) failed to yield sufficient radiogenic Ar to provide a meaningful age, supporting our field inference that it is still younger than the dated lava flow."
References Cited
[1] Trident Volcano: four contiguous stratocones adjacent to Katmai Pass, Alaska Peninsula, 2003
Hildreth, Wes, Fierstein, Judy, Lanphere, M. A., and Siems, D. F., 2003, Trident Volcano: four contiguous stratocones adjacent to Katmai Pass, Alaska Peninsula: in Galloway, J. P., (ed.), Studies by the U.S. Geological Survey in Alaska, 2001, U.S. Geological Survey Professional Paper PP 1678, p. 153-180.
full-text PDF 3.8 MB Complete Eruption References
Trident Volcano: four contiguous stratocones adjacent to Katmai Pass, Alaska Peninsula, 2003
Hildreth, Wes, Fierstein, Judy, Lanphere, M. A., and Siems, D. F., 2003, Trident Volcano: four contiguous stratocones adjacent to Katmai Pass, Alaska Peninsula: in Galloway, J. P., (ed.), Studies by the U.S. Geological Survey in Alaska, 2001, U.S. Geological Survey Professional Paper PP 1678, p. 153-180.
full-text PDF 3.8 MB 