Sedimentology and paleontology of a tsunami deposit accompanying the great Chilean earthquake of February 2010
At Pichilemu, in the northern third of the rupture area of the moment magnitude scale (Mw)
8.8 2010 Chile earthquake, deposits of the tsunami accompanying the earthquake consist of
a lower layer of medium to fine sand (mean grain size of 200μm) containing rock clasts,
overlain by a thin, silty, very fine sand (mean grain size of 125μm) layer. Based on a
sedimentological model, most (90%) of the deposit is finer than 401–408μm suggesting
tsunami flow velocities were between 7m/s and 13.5 m/s. Ostracods were common in the …
8.8 2010 Chile earthquake, deposits of the tsunami accompanying the earthquake consist of
a lower layer of medium to fine sand (mean grain size of 200μm) containing rock clasts,
overlain by a thin, silty, very fine sand (mean grain size of 125μm) layer. Based on a
sedimentological model, most (90%) of the deposit is finer than 401–408μm suggesting
tsunami flow velocities were between 7m/s and 13.5 m/s. Ostracods were common in the …