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

Table 1

Radiocarbon dated samples from Seaside, Oregon.

Site name	Depth (cm)	Material type	C14 ± yr PB	Calibrated* cal yr BP 2𝜎	Lab no. beta-	Ref.
Covej40b	143	Cone	1230±40	1060–1260	198700	4
Covej40b	228	Cone	2770±40	2780–2950	198701	4
Palmrose	Base	Midden	~3,650			1
Palmrose	Top	Midden	~1,600			1
832	90	Peat	590±70	515–668	96840	3
NW2	48	Peat	480±60	326–644	42112	2
NW2	70	Peat	800±60	657–904	42113	2
NW2	111	Peat	1100±70	804–1230	42088	2
NW2	158	Peat	1370±70	1094–1409	44595	2
NW2	268	Peat	2000±70	1749–2148	42114	2
AveQ	Base	Midden	~3,250			1
AveQ	Top	Midden	~1,160			1
j22	72	Leaf	150±30	60–290	194483	4
j4	230	Twig	210±40	136–315^∧	194481	4
823	74	Peat	450±60	312–625	96835	3
j49	410	Org.Mud	680±40	540–660	198699	4
j69	70	twig	1530±40	1320–1520	198698	4
716	81	Peat	360±70	292–518	96837	3
879	54	Peat	480±90	316–653	99234	3

Core sites and core logs are shown in Figure 2. Sample position is presented in depth (cm) below surface.
Calibrated years BP starts at 1950 AD.
Some event ages are approximated to 1000 yr BP (ka) in the text.
References (Ref): (1) [9, 11]; (2) [2]; (3) [4], (4) [6].
∗Radiocarbon Calibration from CALIB 5.0.2 [12].
∧Radiocarbon calibrated age (j4) for older peak (81% probability distribution) of bimodal curve.