- Library Home /
- Search Collections /
- Open Collections /
- Browse Collections /
- UBC Undergraduate Research /
- History and Dynamics of Explosive Volcanism at Tseax...
Open Collections
UBC Undergraduate Research
History and Dynamics of Explosive Volcanism at Tseax Cone, British Columbia Gallo, Rose
Abstract
The eruption of Tseax Cone, approximately 320 years ago, is thought to be the deadliest volcanic eruption in Canadian history, resulting in the deaths of an estimated 2000 people. This small eruptive center in northern British Columbia comprises two cinder cones, a highly dissected spatter cone, a tephra deposit covering an approximate area of 2.2 x 10⁷ m², and a 32 km long lava flow. New geochemical, paleomagnetic, petrographic and field data are drawn upon to propose a new hypothesis that all eruptive materials at Tseax were produced during a single period of activity. The eruptive sequence is shown to begin with low energy fire fountaining forming a small cinder cone approximately 60 m in diameter and a spatter cone 460 m in diameter. Higher energy fountaining activity from a new vent, slightly offset within the spatter cone, and the production of a tephra column slightly more than 5 km high and lasting for approximately one day followed the first eruptive phase. The high energy phase produced a larger cinder cone and a highly asymmetric, northeast elongate, tephra deposit. The final phase of the eruption was the extrusion of the lava flow accompanied by a final sputtering of ballistics from the main vent.
Item Metadata
Title |
History and Dynamics of Explosive Volcanism at Tseax Cone, British Columbia
|
Creator | |
Date Issued |
2018-04
|
Description |
The eruption of Tseax Cone, approximately 320 years ago, is thought to be the deadliest volcanic eruption in Canadian history, resulting in the deaths of an estimated 2000 people. This small eruptive center in northern British Columbia comprises two cinder cones, a highly dissected spatter cone, a tephra deposit covering an approximate area of 2.2 x 10⁷ m², and a 32 km long lava flow. New geochemical, paleomagnetic, petrographic and field data are drawn upon to propose a new hypothesis that all eruptive materials at Tseax were produced during a single period of activity. The eruptive sequence is shown to begin with low energy fire fountaining forming a small cinder cone approximately 60 m in diameter and a spatter cone 460 m in diameter. Higher energy fountaining activity from a new vent, slightly offset within the spatter cone, and the production of a tephra column slightly more than 5 km high and lasting for approximately one day followed the first eruptive phase. The high energy phase produced a larger cinder cone and a highly asymmetric, northeast elongate, tephra deposit. The final phase of the eruption was the extrusion of the lava flow accompanied by a final sputtering of ballistics from the main vent.
|
Genre | |
Type | |
Language |
eng
|
Series | |
Date Available |
2018-05-02
|
Provider |
Vancouver : University of British Columbia Library
|
Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
|
DOI |
10.14288/1.0366164
|
URI | |
Affiliation | |
Campus | |
Peer Review Status |
Unreviewed
|
Scholarly Level |
Undergraduate
|
Rights URI | |
Aggregated Source Repository |
DSpace
|
Item Media
Item Citations and Data
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International