Seismic Events at Jarmaq Trench

Location

see site in Google Earth

Sources and Links

Nemer, T. and M. Meghraoui (2006). "Evidence of coseismic ruptures along the Roum fault (Lebanon): a possible source for the AD 1837 earthquake." Journal of Structural Geology 28(8): 1483-1495.






Jarmaq Trench - Plots, Tables, Trench Logs, etc.

Description Image Source Comments
Trench Location
Fig. 5

  1. Aerial photograph showing the Roum fault to the west of Jarmaq basin (see location on Fig. 4). Fault trace(s) indicated with white arrows. Boxes indicate locations of b and c.
  2. Field photograph showing fresh composite fault scarps (2-2.5 m high) indicated with white arrows and offset stream (labelled 8 on Fig. 4 and in Table 1). Note also the pressure ridges between the two fault scarps.
  3. Field photograph showing trench location and offset stream 10 (Fig. 4 and in Table 1).Fault trace(s) are indicated with white arrows.


Nemer and Meghraoui (2006)
Nemer and Meghraoui (2006) Figure 5
Trench Photo and Log
Fig. 6

  1. 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).
  2. 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.


Nemer and Meghraoui (2006)
Nemer and Meghraoui (2006) Figure 6
Schematic Reconstruction
of paleoseismic events
Fig. 8

Schematic reconstruction of the palaeoseismic events as observed in the trench (Fig. 6a). Steps 1 to 12 illustrate the relationships between the 5 faulting episodes and successive alluvial-colluvial deposits. The white caliche units ( g and e) mark the stratigraphic succession and point out the rupture locations. Event Z is covered by unit a, which corresponds to a thick colluvial unit visible on the western edge of the trench.

Nemer and Meghraoui (2006)
Nemer and Meghraoui (2006) Figure 8