Geochemical impacts to prehistoric iron-rich siliceous artifacts in the nearshore coastal zone

In the Middle Atlantic region of the United States, landscapes drowned by sea level rise contain scores of prehistoric archaeological sites. These sites provide archaeologists with a rare opportunity to investigate various geologic processes. During the transition from a terrestrial to an offshore setting, the materials associated with an archaeological site are exposed to a series of geochemical processes inherent to the formation of tidal marsh. The duration of the geochemical exposure to tidal marsh is largely dependent on the rate of marine transgression. Here we describe the stages associated with the sulfidization and sulfuricization scheme and the impact to iron-rich lithic artifacts from naturally drowned archaeological sites. Sulfidization and sulfuricization should also impact buried archaeological materials as a result of anthropogenic dredge spoil dumping and the creation of man-made tidal marshes along modern coastlines. Our results indicate that the surfaces of an iron-rich artifact, as well as its interior are visually and geochemically altered by prolonged exposure to the anaerobic conditions of a tidal marsh. Not only should researchers be cautious about making lithic material identification on artifacts found within coastal tidal marsh areas, but museum curators should be aware of the damaging impact of long-term aerobic storage. The geochemical tidal marsh scheme that has altered or corroded iron-rich lithic artifacts in the nearshore zone is an expression of a process that has impacted numerous earlier prehistoric sites currently located on the continental shelf or beneath the coastal estuaries around the world.     

New Bioarchaeological Evidence and Radiocarbon Dates from the Lambayeque/Sicán Culture Camelids from the El Brujo Complex (Northern Coast of Peru): Implications for Funerary and Herd Management Practices

ABSTRACT

Pastoralism and camelid management have been essential to all aspects of pre-Hispanic Andean societies. Here, we present zooarchaeological and isotopic data on domestic camelid remains from Huaca Cao Viejo (El Brujo archaeological complex) on the northern coast of Peru, and dated to the Lambayeque/Sicán period—to characterise their biological age, diet, life history, possible geographic origin and ritual use. Domestic camelids, representing a wide range of biological ages and a high rate of polydactyly, were found as burial offerings in direct association with human funerary bundles (fardos). Direct AMS dates indicated that camelids were buried over a short period of time (AD 1022–1176) confirming the Lambayeque presence in the Chicama Valley during the first half of the Late Intermediate Period. Stable isotopic analyses were carried out on both bone collagen and hair keratin, including incremental analysis. A considerable variability in δ¹³C values at both the intra-individual and the intra-group level and a large contribution of C₄ resources to diet are shown. This clearly supports local management and camelids originating from various herds. Zooarchaeological and isotopic evidences suggest diversity in herding practices and suggest the importance of the herds in fulfilling the transportation demands for trade in goods.     

Coastal and marine studies in the department of geography and environment at the University of Aberdeen

ABSTRACT

The Department of Geography and Environment at the University of Aberdeen has a long history of coastal and marine teaching and research from the 1960s to the present day. Beginning with the work of Walton and latterly Ritchie, the paper traces the coastal and marine studies in the Geography degree programme, the development of the Marine and Coastal Resource Management degree, and the introduction of more recent courses such as Managing Our Coasts and Seas, Hydrography, and Land and Marine Conservation. Establishment of the Centre for Marine and Coastal Zone Management (CMCZM), and later the Aberdeen Institute for Coastal Science and Management (AICSM), provided a clear focus for continuing academic research into integrated coastal management and marine spatial planning. This complemented long-term involvement with Shell, SOTEAG (Shetland Oil Terminal Environmental Advisory Group), the Association for Geographic Information (AGI), OceanLab, the EUCC, and several Scottish coastal fora. The creation of the Unmanned Airborne Vehicle (UAV)/Unmanned Airborne System (UAS) Centre for Environmental Monitoring and Mapping (UCEMM) in 2014 brought together the role of remote sensing, GIS and photogrammetry in monitoring, mapping and modelling the coastal environment.     

The Iron Age Maritime Interface at the South Bay of Tel Dor: results from the 2016 and 2017 excavation seasons

The aim of the Tel Dor joint Sea and Land Project is to reassess and expand understanding of the maritime interface of Iron Age Dor. During 2016 and 2017 five features excavated under water provided new data about the development and chronology of this interface. The results support a revised dating and interpretation of previously excavated structures and the identification of several new stone‐built coastal fortification and maritime features, dating to the Early Iron Age. A later phase of construction attributed to the 7th century BCE Assyrian period at Dor was also documented. The outcome of the excavation is the introduction of new aspects of the development of Dor in the Iron Age, including what is likely part of the Iron Age II city's harbour. This may encourage revisiting current views of harbour evolution in the eastern Mediterranean.