AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
About Alaska's Volcanoes | Hazards from Alaska's Volcanoes | Map & Alphabetical List | Interactive Map | Eruption Search | Volcano Search 
You are here: Home > Volcano Information

Trident reported activity



Event Name : Trident 44000 yBP

Start: 44000 (± 12000 Years) Years BP K-Ar

Lava flow: BibCard
Eruption Type:Effusive
Eruption Product: andesite BibCard

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."

Contact AVO Privacy Accessibility Information Quality FOIA
URL: avo.alaska.edu/volcanoes/activity.php
Page modified: March 30, 2017 14:36
Contact Information: AVO Web Team

twitter @alaska_avo
facebook alaska.avo
email Receive volcano updates by email: USGS VNS

This website is supported by the U.S. Geological Survey under Cooperative Agreement Grant G19AC00060 and G19AC00171.

Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey.