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  • MOUNT BAKER: Eruptive history, hazards, research.

    Visit Mount Baker Volcano Research Center websites Main website and the blog These are no longer actively maintained but are still good references [DT, April, 2020]
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    This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License.
    Northwest Geology Field Trips, by Dave Tucker, is licensed under a Creative Commons Attribution-Noncommercial- Share Alike 3.0 United States License. You can use what you find here, repost it with attribution to the author, "remix" it for your own purposes, but may not use it with the intent of making money off of it.

    EDUCATORS: Please feel free to use anything you find here that is useful to your mission educating people about Earth science. E-mail me if it would help to have a larger or higher-resolution version of any of the images. tuckerd at geol dot wwu dot edu

Sign up for Geology Field Trip to Whidbey and Fidalgo Islands

May 14th, 8:30-4:30

TRIP IS FULL. THERE IS A WAITING LIST. To get the earliest crack at future trips, please subscribe to MBVRC RSS posts via email- in the margin to the left.


The view from Mount Erie, once a magma chamber below an oceanic volcano.

Mount Baker Volcano Research Center announces a guided geology field trip. This is a geologic smorgasbord, with stops near Anacortes on Fidalgo Island including ophiolite rock at Washington Park, Mount Erie’s drive-up summit, Rosario Beach and Rosario Head, and Deception Pass. Proceeding to  Whidbey Island we will visit at a minimum West Beach and an ill-sited development on the beach at Swantown.  The trip will be led by Doug McKeever, geology professor (emeritus) at Whatcom Community College, assisted by Dave Tucker, Research Associate with Western Washington University Geology Department and author of Geology Underfoot in Western Washington. Both are board members of MBVRC. COST is $75 per person (prepaid). Proceeds go to the MBVRC research fund.


Doug McKeever and field trippers examine rock structure.

Van transportation will be provided, and a printed guide describing the most important geologic features of the stops. No hammers, please. Please bring a lunch, beverage (no alcohol please), and shoes and clothing suitable for a short beach walk and for the weather. Trip will “go” rain or shine.

13786 Washington Pk

Glacially polished mantle rock at Washington Park

Credit card: please go to the MBVRC donation page and put $75 in the ‘donation amount’ at the top [please feel free to contribute more, donations are tax deductible]. Make payment to the MBVRC account using our email: research  at  mbvrc.wwu.edu You don’t need a Paypal account to do this.

Check: If you prefer to pay MBVRC directly, please send a check right away to order of MBVRC to 708 13th St, Bellingham, WA 98225. If you choose this option, please reserve via email immediately to research  at   mbvrc.wwu.edu. Will hold your spot as long as we can while your check is in transit.

This is a repeat of a trip we sponsored in spring of 2014. That trip filled very quickly so don’t delay to sign up!


The Biggest Mutha’ erratic?

As promised, a new ‘Mother of all erratics’ west of the Cascades (so far- see the challenge at the bottom of the article. The Waterman Erratic is in the Saratoga Woods Preserve near Langley, Whidbey Island. You have to hike 20 minutes through the forest to get there.


The Waterman Erratic, Saratoga Woods Preserve, Whidbey Island.

Blowers Bluff geologic field trip added

A geological field trip to the fabulous glacial and interglacial deposits at Blowers Bluff on Whidbey Island is now up. You can find it at


The field trip will be found by going to “The Field Trips”, then “Pleistocene Glacial Stratigraphy on Whidbey Island”, then the trip. YOu can also find the earlier trip to Useless Bay and Double Bluff there.

A visit to the Coupeville erratic on Whidbey

Check out this 30-foot-high monster!

The 30-foot-tall Coupeville erratic sits in front of a house and an apartment complex.

Whidbey Island glacial stratigraphy series begun

I have published the first in a series of field trips to Whidbey Island beaches that expose late-Pleistocene glacial and interglacial sediments. The first one visits the west shore of Useless Bay and Double Bluff, where you can also see fabulous liquifaction features interpreted to result from earthquakes along the South Whidbey fault.

The next trip will go to Blower’s Bluff. I have visited and gotten photos, and will write it up soon. Please subscribe to this website if you want to know when I have posted it.