Turbidites in R/V Thuwal Cores 11, 12, 14, 15, 16, 17, and 18 in Aragonese and Eilat Deeps and possibly Core 10 in the Dakar Deep - ~1970-~2000 CE (1σ) Open site page in a new tab



Bektaş et al. (2024:11) report that " turbidites dated to the late 20th century are unambiguously seen as Type I events [Turbidite Event] at the tops of cores in Aragonese and Eilat Deeps ([R/V Thuwal Cores] 11, 12, 14, 15, 16, 17, and 18) and as Type II events [Turbidite or Flooding Event] in Dakar Deep (Core 10)." They note that these turbidites "constitute a perfect benchmark of our sedimentary system as they are almost certainly the sedimentary traces of the 1995 Nuweiba (MW 7.2) earthquake, the most recent major earthquake in the Gulf of Aqaba." Based on Probability Density Functions (PDFs) presented in Fig. 8 of their paper, these turbidites should have been deposited between ~1970 and ~2000 CE ( ). Bektaş et al. (2024:11) further note that "given that the Aragonese Fault, and probably partially the Eilat Fault as well, were the source faults for the 1995 Nuweiba earthquake and that the earthquake rupture propagated northward (Baer et al., 2008; Hofstetter, 2003; Klinger et al., 1999; Shamir et al., 2003; Ribot et al., 2021), it is not surprising that turbidites (Type I events) from this earthquake are not found in cores from the southern part of the gulf (i.e., cores 1 to 10)." Bektaş et al. (2024:11-12) also note that "despite the proximity to the epicenter of the 1995 earthquake, no turbidite associated with this event is visible in core 13 due to sediment loss at the top of that core."


Figure 4 - Sedimentary events detected in the radiographic images of the Gulf of Aqaba cores, labelled by letters and indicated by red, gray, and yellow vertical bars. Depths of 210Pb and 14C measurements are also shown by green and blue rectangles next to the images, respectively. In the table, raw and calibrated 14C results are listed. The raw and composite depths, and the depths corresponding on core 11 (after stratigraphical correlation) for each 14C sample are also given. In the lower right, results of 210Pbex measurements on cores 3, 7, and 17 and the corresponding sedimentation rates (SR) are presented. - click on image to open in a new tab - from Bektaş et al. (2024)




By Jefferson Williams