El Ouahabi et al. (2018) identify E6 at ~580 cm depth, at the base of the core, as a thick sandy layer rich in plagioclase (El Ouahabi et al., 2018:5). This unit contrasts with surrounding finer-grained sediments and reflects a substantial input of coarse detrital material into the basin, indicating a high-energy depositional episode within an otherwise low-energy lacustrine environment.

Unlike overlying events, E6 is not described as containing diagnostic soft-sediment deformation features such as sand pillows or sand dikes. Instead, the deposit appears to represent a large-scale influx of coarse material, possibly related to sediment remobilization and transport into the basin. While strong seismic shaking could trigger such remobilization, the absence of clear liquefaction structures means that an earthquake origin remains possible but not definitive, and high-energy hydrological processes such as flooding or channel shifts could also account for the observed deposit.

Chronologically, E6 is constrained by the authors’ age–depth model, which integrates radiocarbon dating of micro-charcoal, sedimentation rates, and regional environmental tie points. Based on its basal position within unit 1, E6 likely dates to approximately 2750 BCE, although this estimate remains model-dependent and is not tied to a specific historical earthquake.

Fig. 3b - Age–depth diagram for Amik Lake based on calibrated ¹⁴C age results obtained from micro-charcoal remains, ²¹⁰Pb and ¹³⁵Cs activities, correlation with other dated sedimentary sections in the Amik Basin, and historical earthquake tie point - click on image to open in a new tab - El Ouahabi et al. (2018)