Marriner et al. (2005) analyzed four sediment cores taken from the landward edge of Tyre’s northern harbor using lithological and biostratigraphical analysis together with AMS radiocarbon dating of organic material recovered from the cores. The stratigraphy shows a clear change in sedimentation between the 6th and 10th centuries CE, when harbor deposits give way to a shelly sand unit (Unit A) characterized by mixed marine macrofauna, increased coastal ostracod taxa, and broken foraminifera tests indicative of wave action and open marine influence. Core profiles from this interval contain no identified tsunamite deposits, while the sedimentary record instead reflects the cessation of harbor maintenance such as dredging operations and the re-exposure of the harbor environment to marine swell and currents ( Marriner et al. 2005). Subsequent work documents post-6th-century coastal subsidence of roughly 3–3.5 m around Tyre, inferred from drowned harbor structures and submerged quarries ( Morhange et al. 2006:90).