Microbiology of Concretions, Sediments and Mechanisms Influencing the Preservation of Submerged Archaeological Artifacts

Research conducted at deep-ocean ship wreck sites in the North Atlantic Ocean, the Mediterranean Sea and in the Gulf of Mexico have revealed that microorganisms play a significant role in both the preservation and loss of submerged artifacts. Research to be reported concentrates on the influence of microbiologically induced concretions on the survival of maritime artifacts. Rusticles, a common form of concretion, have been found to provide valuable information to archeology (Garzke et al. 1997, Proceedings of the Society of Naval Architects and Marine Engineers). The role of rusticles in the preservation of recalcitrant materials such as coal and glass fragments that become embedded within these growths, as well as forensic chemical analysis can be used to determine the nature of goods or munitions being carried by the ship at the time of its sinking, and will form examples.