Discovery Bay, Washington has more tsunami deposits than anywhere else in the state.
Studying tsunami deposits in the tidal marsh at the head of Discovery Bay.
Beds 1 (top light layer) and 2. Bed 1 inferred to be from the 1700 CE Cascadia earthquake tsunami. Bed 2 is about 600 years old, and may represent the penultimate Cascadia event.
Additional 7-10 deposits downsection. Refinement of the published ages for the older deposits by Williams et al. (2005, https://doi.org/10.1191/0956683605hl784rp).
Historical tsunami flooding in 1964
(Above) Newspaper account of flooding of a residence (Right) at the head of Discovery Bay in 1964 from the Alaska tsunami. (Below) tsunami modeling of an Alaska tsunami at the location of the Bowman residence.
