This “Beaver Board” sign on Oregon Geology is about tsunamis in the Newport area and is located at the entrance to the Oregon Coast Aquarium.
Marker Name: Tsunami Newport
Marker Text: Devastating waves called “tsunamis” can strike the Oregon coast at any time. Most tsunamis are caused by great undersea earthquakes. Such earthquakes occur along the Cascadia Subduction Zone, one of the largest active faults in North America
Tsunamis are dangerous and destructive. Cascadia tsunamis have struck the Oregon coast several times in the past 2,000 years. Most recently, about AD 1700, a tsunami caused by an earthquake on the Cascadia Subduction Zone flooded marshes landward of Yaquina Bay and other Oregon bays. This tsunami and earlier ones are known to have affected large areas because tsunami-deposited sand has been found here in Newport and in other coastal lowlands in Oregon, Washington, British Columbia, and northernmost California.
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