Posted by: magmatist | October 12, 2014

MOUNT BAKER ERUPTIVE HISTORY AND HAZARD PRESENTATION

Whatcom County Library System is sponsoring 3 Mount Baker talks.

“MOUNT BAKER ERUPTION HISTORY AND HAZARDS”

Deming Library, October 18, 4 PM.

Ferndale Library, October 21, 7 PM.

Everson Library, November 8, 3 PM.

ABOUT THE MOUNT BAKER ERUPTIVE HISTORY AND HAZARD PRESENTATION

The talk presents the volcanic history of Mount Baker: eruptions, collapses, and the hazards this active volcano poses. The state of monitoring at the volcano will be discussed. The likely volcanic future and the potential for impacts on Whatcom-Skagit communities will close out the presentation.

Only 40,000 years old, the Mount Baker cone is about the same age as Mount St. Helens. Very little was known of its volcanic history until extensive geologic mapping by USGS geologists Wes Hildreth and Kevin Scott began in the mid 1990s. We now know that Mount Baker is but the youngest in a series of volcanoes in the immediate area extending back over 1,000,000 years. Other volcanoes in the Baker group include: two calderas that each erupted roughly 200 times as much ash as Mount Saint Helens did in 1980; a subglacial cone; and a number of once-sizable stratovolcanoes, most now eroded to nubs. Collapse of the volcano’s southwestern slope sent a large mudflow, or lahar, down the Middle Fork Nooksack River into the lowlands of Whatcom County and possibly as far as the Fraser River. Field studies continue to describe the post-glacial eruptive history. The newest, soon-to-be published research has revealed the patterns of ash deposits erupted from Mount Baker.

The presentations are given either by Dave Tucker , a research associate in the geology department at Western Washington University, or Doug McKeever, geology professor at Whatcom Community College. Both are board members of MBVRC, and have carried out considerable field work on the volcano.

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