Nemer and Meghraoui (2006) Nemer and Meghraoui (2006) report that Event X in the Jarmaq trench, which intersects the Roum fault, cuts unit d and occurred before the deposition of unit c. Event X is constrained using the nearest dated layers above (unit c) and below (unit e), indicating that it occurred between 8555–7603 BCE and 2920–2879 BCE. It postdates Event W, which is similarly constrained within this range. Unit c was radiocarbon dated by one bulk soil sample (JAR-2-B). Unit e was also radiocarbon dated by one bulk soil sample (JAR-13-B). Event X formed a fault scarp against which the post-seismic colluvial wedge j accumulated. This makes it the clearest example in the trench of rupture with a significant normal component, while still occurring within a fault zone that also shows strike-slip shear fabric.

Fig. 8 - Schematic reconstruction of palaeoseismic event X - clcik on link to open in a new tab - Nemer and Meghraoui (2006)

Fig. 6 - (a) Photo mosaic of the southern wall of the excavation across the Roum fault showing the rupture strands (white lines) and associated stratigraphic units (labelled in yellow). (b) Illustration of a. The 5 palaeoseismic events determined from the capping horizons are labelled V to Z in black boxes (see text for details and Fig. 7 for the palaeo-earthquake distribution). Black squares are the 6 measured and reliable unit radiocarbon ages. - clcik on link to open in a new tab - Nemer and Meghraoui (2006)