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Geology

Michael Edward Yeaman began his academic studies at Stanford University in 1975. He graduated with a Bachelor’s Degree in Geology/Geophysics and a Master’s Degree in Exploration Geophysics in 1980. He has spent the last 45 years fascinated with the geosciences and its many aspects of time, space and beauty.  He left his career as a professional geoscientist and energy consultant moving to Orcas Island in 2004. Since then, he has developed and conducted regional geologic field trips for local schools, charities and personal enjoyment. He has assisted in the continued scientific exploration and understanding of this region. Michael is well known as an enthusiastic and infectious teacher who loves his subject.

Select Field Trips

Sucia Island

Lopez Island

Orcas Island/ San Juan Islands Region

PNW Columbia River Basin

The Yeaman Grid
Yeaman at Sucia Island contact

Sucia Island Geology

Topographic Map of Sucia Island with Field Trip visit sites.

Geologic Map of Sucia Island

Q - Quaternary

Ec - Eocene

K - Cretaceous

Strata Dip Direction and Amount in degrees (i.e. NNE, 72 °) and Age date in millions of age before present (i.e. 96 my, middle Cretaceous)

 - Syncline axis

Geologic Map of Orcas and Sucia Islands
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Sucia Island weathered outcrop
Sucia Island concretions
Lopez Island beach
Sucia Island shear folds

San Juan Islands Geology

Geologic Map of the San Juan Islands
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Lopez Island outcrop
Lopez Island discussion
Orcas Island Marble quarry discussion
Over the hike on Lopez Island
Lopez Island conversation
Orcas Island glacial sedimentary contact

PNW Columbia Basin

Geology map of PNW Columbia Basin volcanics
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Eastern Washington fluvial volcanic boulder
Columbia River
Yakima Valley soils on volcanics
Paleo Columbia River conglomerate
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