Malta: Submerged Landscapes and Early Navigation

The island of Malta is best known for its spectacular stone temples built by Neolithic farmers about 6000 years ago, who traded regularly with Sicily and other areas in the central Mediterranean. At a distance of over 100 km to the nearest continental land mass, it is generally assumed that Malta was unin-habited before the Neolithic period and was then occupied by competent Neolithic seafaring colonists. However, radiocarbon-dated pollen assemblages from fluvial sediments indicate an earlier phase of Maltese prehistory that preceded the period of the temple builders and included agriculture at a time when sea level was c. 6 m lower than the present day. These submerged coasts would have served as landing places for early navi-gators and offered fertile land nearby, but they have not yet been subject to systematic underwater archaeological survey. There is also the possibility of even earlier habitation at a time when Malta was connected to Sicily by dry land.

ture that is best known for its spectacular 'temples' built of large worked and decorated stones (Evans 1971;Pace 1996;Ugolini 2012) (Fig. 17.2). At least 26 such megalithic monuments have been discovered, and UNESCO has declared the surviving structures as a World Heritage Site. Many of them are located in prominent positions that overlook natural harbours and have commanding views over the sea. Since the sea level of that period was approximately the same as today, this topographic situation also applies to the period when the monuments were erected and used ( Fig. 17.3). Their distribution in the landscape points to the importance of opensea navigation and to access points leading to and from the sea (Grima 2004).
There is ample evidence for Malta's connectivity with various other parts of the central Mediterranean during the Temple Period. This includes a variety of imported objects and raw The 120 m depth contour is roughly equivalent to the coastline when sea level was at its lowest at the Last Glacial Maximum, while the 20 m contour represents a time somewhat prior to the currently known earliest traces of human activity on Malta. Drawing by Moritz Mennenga materials, for instance, obsidian from both Lipari and Pantelleria, at distances of 159 km and 204 km, respectively (see also Castagnino Berlinghieri et al., this volume). Imports of red ochre, flint and pumice are also represented in the archaeological record of this time. Likewise, miniature axes found in Malta are made from various rocks originating from Calabria in the southern Italian mainland and from Mount Etna on Sicily (Trump 2002, p. 38-41). The presence of a few 'exotic' ceramic sherds confirms trade in finished goods originating from Sicily (Trump 2002, p. 211).

Predecessors
The arrival of agriculture and the demonstrable maritime activities of the subsequent periods took place when sea level was as much as 6 m lower than present (Lambeck et al. 2011;Furlani et al. 2013Furlani et al. , 2017. It is therefore possible that some of the earliest farming and navigation activities would have involved the use of coastal areas that are now submerged. The existence of inundated archaeological sites and therefore of significant research potential in the field of submerged prehistory around the Maltese islands can thus be assumed. In fact, pollen analyses of radiocarbon-dated samples from fluvial sediments have recently provided important evidence for agricultural activity in the form of traces of cereals prior to the Temple Period as early as 7200 cal BP (Marriner et al. 2012;Djamali et al. 2013).
To date, research on early Maltese prehistory has focused on the Late Neolithic monuments and other terrestrial sites such as burials (Pace 2004). Due to this emphasis, evidence of possible earlier periods of habitation, which could have been characterized by sites and items of a less spectacular nature, may have been overlooked. Farmers make much stronger imprints in pollen diagrams than do fishermen and huntergatherers. This could be one reason for the current lack of traces of preagricultural inhabitants in the pollen diagrams from the islands. Should pre-Neolithic people have inhabited the area, however, there is little doubt that the most attractive foraging grounds would have been in coastal Fig. 17.3 Landscape changes due to sea-level rise and deposition of river sediments at Burmarrad. Traces of intensive land use (farming) have been found in up to 7200-year-old marine sediments below the present river plain. The information on sea-level change and the silting up of the low-lying areas is based on data from the geological core sites shown with green symbols. Drawing by Timmy Gambin with information from the Paleomed Project lowlands around large bays and estuaries that are today submerged under many metres of water. To date, very little research on this specific field has been done.

Potential Research Areas
Malta has a long tradition of underwater archaeology focused on more recent millennia, primarily remains of ancient shipwrecks as well as other remains datable to the historical period (Azzopardi and Gambin 2012). Systematic searches for submerged Stone Age sites have not yet been attempted. However, the reconstructed topography of the submerged coastal zone during this period shows plains and rivers that may have been conducive to human settlement (Fig. 17.3). Today, these areas are covered by thick marine sediments as well as by dense mattes of Posidonia oceanica (Fig. 17.4). This cover of Posidonia mattes probably has positive effects on the preservation of archaeological deposits. However, at the same time, it reduces the potential outcome of visual archaeological inspection. Given the presence of Upper Palaeolithic sites such as San Corrado, Grotta Giovanni and Canicattini Bagni in south-eastern Sicily (Bietti 1990), it would be reasonable to assume that similar remains may yet be found in submerged landscapes off the northern coasts of Malta and Gozo.
Other areas may be more profitable in the archaeological search for traces of preagricultural and Early Neolithic habitation -that is, the Stone Age estuarine floodplains. The inner margins of these are present in the modern landscape, but the lower reaches of these palaeoestuaries are located below sea level and covered by very deep marine sediments from later periods (Fig. 17.3). The anaerobic nature of sediments in such geological settings provides the ideal context for the survival of organic materials such as wood and raises the possibility of finding, amongst other artefacts, remains of prehistoric watercraft that may have been abandoned in the estuaries.
An ongoing large-scale offshore remotesensing project sheds light on the extensive submerged landscape, which existed around the Maltese islands prior to the rise in sea level (Micallef et al. 2013). Although collected primarily for geological purposes, these data have identified ancient rivers, palaeoshorelines, sinkholes and submerged caves, all areas of high potential for future underwater archaeological research, and these provide a valuable basis for the preparation of underwater surveys.

Management of the Underwater Cultural Heritage
The Superintendence of Cultural Heritage is responsible for the protection, conservation and promotion of cultural heritage, and Heritage Malta for the management of cultural heritage sites. Research and training are undertaken by the University of Malta. The images or other third party material in this chapter are included in the chapter's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the chapter's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.