The exact locations of Tyre and Sidon's ancient harbors, Phoenicia's two most important city-states, have attracted scholarly interest and debate for many centuries. New research reveals that the ancient basins lie buried beneath the medieval and modern city centers in southern Lebanon.
     A network of sediment cores have been sunk into the cities' coastal deposits and studied using high-resolution geoscience techniques to elucidate how, where, and when Tyre and Sidon's harbors evolved since their Bronze Age foundations. In effect, ancient port basins are rich geological archives replete with information on human impacts, occupation histories, Holocene coastal evolution, and natural catastrophes.
     After the sixth and tenth centuries A.D., tectonic collapse, tsunamogenic impacts, and relative commercial decline meant that the harbors were no longer properly maintained, gradually buried beneath thick tracts of coastal sediment and lost until now.

Source: Physorg.com (5 January 2006)