Pre-existing caverns in salt formations could be the major cause of sinkhole hazards along the coast of the Dead Sea

Details Pre-existing caverns in salt formations could be the major cause of sinkhole hazards along the coast of the Dead Sea Pre-existing caverns in salt formations could be the major cause of sinkhole hazards along the coast of the Dead Sea

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3519404l&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 19, CiteID L19404

Physics

Geophysics

4

Global Change: Land Cover Change, Global Change: Sea Level Change (1222, 1225, 4556), Exploration Geophysics: Instruments And Techniques, Physical Properties Of Rocks: Magnetic And Electrical Properties (0925), Global Change: Geomorphology And Weathering (0790, 1824, 1825, 1826, 1886)

Scientific paper

Since 1990 hundreds of sinkholes have appeared along the coast of the Dead Sea. In the literature the rapid development of sinkholes is explained as a result of a drop in the level of the Dead Sea. This model assumes very fast dissolution of large volumes of salt and the creation of new caverns that cause sinkholes in 10 to 20 years. However, the results of our geophysical study do not confirm the fast dissolution assumption. To explain the available field observations, we propose the following model: (1) slow dissolution of salt (much longer than 20 years) with the creation of caverns without development of sinkholes; (2) sinkhole development is triggered by the lowering of the groundwater level because the rocks overlying the salt formation become unsaturated; (3) the time of sinkhole appearance is controlled by the mechanical properties of the rocks that overlie pre-existing caverns.

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