Paleotsunami Inundation of a Beach Ridge Plain: Cobble Ridge Overtopping and Interridge Valley Flooding in Seaside, Oregon, USA

<table>Scaled photograph of cobbles from exposed crest of Avenue K beach ridge (a), (b) Neawanna cutbank section with AD 1700 paleotsunami sand layer and basalt cobbles (adjacent to site j44), and (c) largest tsunami cobble (20 cm intermediate axis diameter) in paleomarsh depression in Neawanna cutbank section (~160 cm depth) adjacent to site j44 (see Figure <a href="../fig14/">14</a> for core site positions).</table>

Journal of Geological Research

fig15

Figure 15

Figure 15: Paleotsunami Inundation of a Beach Ridge Plain: Cobble Ridge Overtopping and Interridge Valley Flooding in Seaside, Oregon, USA 