Baker geology

Volcanic ash in a trail cut along the Park Butte trail, just west of the trail fork to Railroad Grade. The BA is the dark layer below the vegetation. The orange layer is another Baker tephra, OP, which resulted from a ‘throat clearing’ steam blast at Sherman Crater just before the magmatic BA was erupted. A dark soil layer separates OP from the thin white layer, Layer O ash from Crater Lake caldera (Mount Mazama). Glacial till is at the bottom.

This page links to Baker information on this website, or on the main MBVRC website hosted by Western Washington University.

Click on a page link to learn about specific Mount Baker volcanic or glacial phenomena. This is a work in progress and will be updated. Subscribe to this website via email (free service) to receive notification of additions.

Mount Baker eruptive history: a table based on field work and papers by K. Scott, D. Tucker, W. Hildreth, and various others is posted on our data website.

Links to Middle Fork Nooksack debris flows of May and June, 2013.

Videos taken at the roaring fumaroles in Sherman Crater are posted on YouTube. Find them at

Volcanic ash deposits and volcanic bombs from Mount Baker (2 articles).

Large debris flows that descend Boulder Glacier occur periodically. These are a potential mortal danger to climbers.

Reports of research funded by MBVRC grants are here.

A historic 1912 photo from Loomis Mountain by J.D. Welsh shows the entire south flank of the volcano, and the exact duplicate 2012 photo by John Scurlock showing glacial changes.

Abstracts about Mount Baker from various scientific meetings (

Mount Baker published research papers. Some of them have been annotated or abstracted. (

Mount Baker geochemical data. Includes rock chemistry and fumarole/water chemistry. (



  1. […] Baker facts […]

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