Oyster Dome geo-hike now available

A geology guide to the metamorphic rocks of Blanchard Mountain, northwest Skagit County, Washington, is now posted.  These result from subduction and accretion of a Mid-Jurassic island arc to the margin of North America. You can see it here.

A follow-up trip will go to Pigeon Point, which consists of related rocks on the nearby shoreline.

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