We investigated homogeneous muds, turbidites, and debrites that were preserved in a 457-m deep ICDP drilling (220-0 ka) from the Dead Sea depocenter. Based on previous flash flood measuring, surface plume monitoring, and sediment traps monitoring in the lake center, we link homogeneous muds in the deep core to overflows, and link turbidites and debrites to underflows. The study bridges the gap between our understanding of modern sediment density flow processes and deposits preserved in a long-term geological record in the Dead Sea, a tectonically active subaqueous environment (Dead Sea rift zone).
A recent study investigated turbidites that preserved in a 457-m deep ICDP drilling from the Dead Sea depocenter. This is the first work to show detailed information on turbidites in the region.
1. Key Points:
Seismic origin for prehistoric turbidites is established by analyzing the underlying in situ deformation structures for each turbidite
Data validate a previous hypothesis that soft-sediment deformation formed at the sediment-water interface in the Dead Sea
The new approach permits a more confident geohazard assessment by improving the completeness of a paleoseismic archive
A special issue on sub-aquatic paleoseismology has been published in Marine Geology. The volume 384 ‘Subaquatic paleoseismology: records of large Holocene earthquakes in marine and lacustrine sediments‘ collects papers on marine and lacustrine mass movements that can be used to decipher the earthquake history. The contributions span a wide range of different settings, from the famous Cascadia sites to Greece, and are based on presentations from the International Sedimentological Congress in Geneva (August 2014) and the AGU Fall Meeting in San Francisco (December 2014). more
Here are my latest updates on papers and books that deal with paleoseismology, active tectonics, tsunamis and similar topics. There is a good portion of lake/turbidite paleoseismology with some beautiful seismites. We also have some more general tectonics/review papers, and an interesting attempt to establish a global fault database. Plus, there is an intense ongoing discussion about Kashmir and news from Napa. Enjoy!
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At the end of last year, NHESS published a Special Issue on marine and lake paleoseismology. The volume 154 is an outcome of the ESF meeting Submarine Paleoseismology: The Offshore Search of Large Holocene Earthquakes that was held in
Austria in September, 2010. Guest editors are D. Pantosti, E. Gràcia, G. Lamarche, and H. Nelson. The Special Issue is open access and contains 16 research papers on all kinds of research on paleoseismology offshore. Some of the papers have been published as early as 2012, but others came out few weeks ago. more
