The lagoon systems (Arabic khor) of the Indian Ocean coast are attractive locales for human settlement. Archaeological data from these habitats dates back to the Bronze Age. At this lagoon, note that silting has taken place (see foram study) the dark line just inland from this event (Strand I) can represent an Iron Age shoreline. The much darker line considerably further inland (Strand II) may represent the Flandrian Transgression, ca. 5000 B.C. (see Marcolongo study). Bronze Age populations inhabited these much larger paleo-lagoons dominated by mangrove growth. Mangrove swamps can also be identified by the presence of Terebralia palustris, a common marine invertebrate. Such lagoons are widely spread in the Arabian Gulf, the Indian Ocean and the Red Sea.