Deformed Layer 7 Open this page in a new tab

Deformation Layer 7 at Nahal Darga occurs in unit 9 above Deformation Layer 6 and is dated by Enzel et al. (2000) to ca. 1050-450 BCE (ca. 2400-3000 yr B.P.). The deformed bed is ~150 cm thick and consists primarily of fine to medium sand with a few laminae of aragonite deposited in a near-shore fan-delta setting. The principal deformation features are ball-and-pillow structures inside an intensely deformed layer. The deformation is interpreted to have occurred when the sediment was at or very near the surface and was due to earthquake-induced liquefaction rather than the result of loading or depositional processes. Dating is based on radiocarbon dating and stratigraphic correlation within the fan-delta sequence; Bayesian modeling was not used in the age determinations. The upper bound on age (2400 yr B.P.) is based on an undeformed layer of oganic matter above unit 9 but below unit 10.

By Jefferson Williams