Late Quaternary sea-level change and early human societies in the central and eastern Mediterranean Basin : an interdisciplinary review

This article reviews key data and debates focused on relative sea-level changes since the Last Interglacial (approximately the last 132,000 years) in the Mediterranean Basin, and their implications for past human populations. Geological and geomorphological landscape studies are critical to archaeology. Coastal regions provide a wide range of resources to the populations that inhabit them. Coastal landscapes are increasingly the focus of scholarly discussions from the earliest exploitation of littoral resources and early hominin cognition, to the inundation of the earliest permanently settled fishing villages and eventually, formative centres of urbanisation. In the Mediterranean, these would become hubs of maritime transportation that gave rise to the roots of modern seaborne trade. As such, this article represents an original review of both the geo-scientific and archaeological data that specifically relate to sea-level changes and resulting impacts on both physical and cultural landscapes from the Palaeolithic until the emergence of the Classical periods. Our review highlights that the interdisciplinary links between coastal archaeology, geomorphology and sea-level changes are important to explain environmental impacts on coastal human societies and human migration. We review geological indicators of sea level and outline how archaeological features are commonly used as proxies for measuring past sea levels, both gradual changes and catastrophic events. We argue that coastal archaeologists should, as a part of their analyses, incorporate important sea-level concepts, such as indicative meaning. The interpretation of the indicative meaning of Roman fishtanks, for example, plays a critical role in reconstructions of late Holocene Mediterranean sea levels. We identify avenues for future work, which include the consideration of glacial isostatic adjustment (GIA) in addition to coastal tectonics to explain vertical movements of coastlines, more research on Palaeolithic island colonisation, broadening of Palaeolithic studies to include materials from the entire coastal landscape and not just coastal resources, a focus on rescue of archaeological sites under threat by coastal change, and expansion of underwater archaeological explorations in combination with submarine geomorphology. This article presents a collaborative synthesis of data, some of which have been collected and analysed by the authors, as the MEDFLOOD (MEDiterranean sea-level change and projection for future FLOODing) community, and highlights key sites, data, concepts and ongoing debates

Palaeoenvironmental evolution of the ancient harbor of Lechaion (Corinth Gulf, Greece): Were changes driven by human impacts and gradual coastal processes or catastrophic tsunamis?

International audienceThe Corinth Gulf, Central Greece, is one of the most rapidly widening tectonic rifts on Earth, where large earthquakes with magnitudes of up 7.0 have been documented not only by instrumental records but also assessed from historical reports extending back to the 5th century BCE. Several of these earthquakes were associated with tsunamis, particularly in the western part of the Gulf. Of particular interest is the ancient harbor of Lechaion in the eastern side of Corinth Gulf. We reexamine the hypothesis that Lechaion was hit by high-energy tsunami waves in the 8th-6th century BCE, 1st-2nd century CE, and during the 6th century CE. On the basis of sedimentological, seismotectonic, archaeological and historical data, completed with field observations, we support that there is no evidence for tsunami impact in Lechaion. Local stratigraphy and environmental changes are rather interpreted by human impacts and gradual coastal processes. Such interpretations confirm that the tsunami potential in the east Corinth Gulf is relatively low

Géoarchéologie des îles de la Méditerranée

Parmi les dix mille îles et îlots de Méditerranée, moins de trois cents seraient habités et seulement deux cents mesureraient plus de 5 km2. Ces îles sont des entités géologiques et géographiques complexes où coexistent des formations de roches très anciennes et d'autres créées très récemment (îles volcaniques). A la fois ouvertes sur l'horizon et les côtes continentales voisines, elles restent, paradoxalement, relativement fermées de par leur isolement, créant ainsi des spécificités quant à leur biodiversité et leur colonisation par les sociétés humaines. Les îles de Méditerranée forment ainsi un objet d'étude privilégié pour la géoarchéologie. Celte dernière emprunte les concepts, les méthodes et les techniques de disciplines relevant des sciences humaines et environnementales (l'archéologie, l'épigraphie, la philologie, la géographie. la paléoécologie, la paléontologie...). Cet ouvrage établit un premier état des connaissances dans le domaine de la géoarchéologie des îles de Méditerranée. L'éclatement géographique de ces dernières, ainsi qu'une histoire de l'occupation propre à chacune, démontrent toute la difficulté de globaliser ces espaces géographiques, progressivement transformés en territoires sous l'action répétée des sociétés humaines. Des spécialistes dressent ici les relations complexes entre les dynamiques et les processus paysagers et les logiques d'occupation humaine depuis la fin du Pléistocène. Le présent ouvrage recueille vingt-quatre contributions regroupées dans cinq parties intitulées « Anthropisation et mutations paysagères à la transition Paléolithique/Néolithique » ; « Mobilité et reconstitution des anciens niveaux marins depuis la fin de la dernière grande glaciation quaternaire » ; « Adaptation aux mutations paysagères à l'échelle intra-site : la nécessaire prise en compte des paramètres environnementaux » ; « Deltas, lagunes et marais : des interfaces propices à l'implantation des sociétés humaines » et « Matières premières ; exploitation et interactions ». Cet ouvrage s'adresse principalement à des spécialistes de géographie, d'archéologie et de paléoécologie mais aussi à un public plus large : étudiants des niveaux L-M-D, enseignants et simples néophytes souhaitant s'initier aux concepts, méthodes et techniques de la géoarchéologie