The Big Picture, viewing a cross section, E-W, shows the latest USGS interpretation of the subsurface below Seattle and the Olympic Mountains.
Below are shown some of the Geological Features seen in the cliffs of Whidbey Island:
Great upheavals occurred on ancient Whidbey Island at the aproximate 100+kyears time, creating fissures and doming of sediments- later buried by level beds and exhumed by erosion of cliffs.
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