Fluid chemistry in the Solitaire and Dodo hydrothermal fields of the Central Indian Ridge

Fluid chemistry and microbial community patterns in chimney habitats were investigated in two hydrothermal fields located at the Central Indian Ridge. Endmember hydrothermal fluid of the Solitaire field, located ~3 km away from the spreading center, was characterized by moderately high temperature (307°C), Cl depletion (489 mm ), mildly acidic pH (≥4.40), and low metal concentrations (Fe ≤ 105 μm and Mn = 78 μm ). Chloride depletion indicates that the subseafloor source fluid had undergone phase separation at temperatures higher than ~390°C while the metal depletion was likely attributable to fluid alteration occurring at a venting temperature of around 307°C. These different temperature conditions suggested from fluid chemistry might be associated with an off‐spreading center location of the field that allows subseafloor fluid cooling prior to seafloor discharge. The microbial community in the chimney habitat seemed comparable to previously known patterns in typical basalt‐hosted hydrothermal systems. Endmember hydrothermal fluid of the Dodo field, standing on center of the spreading axis, was characterized by high H₂ concentration of 2.7 mm . The H₂ enrichment was likely attributable to fresh basalt–fluid interaction, as suggested by the nondeformed sheet lava flow expansion around the vents. Thermodynamic calculation of the reducing pyrite–pyrrhotite–magnetite (PPM) redox buffer indeed reproduced the H₂ enrichment. The quantitative cultivation test revealed that the microbial community associated with the hydrothermal fluid hosted abundant populations of (hyper)thermophilic hydrogenotrophic chemolithoautotrophs such as methanogens. The function of subseafloor hydrogenotrophic methanogenic populations dwelling around the H₂‐enriched hydrothermal fluid flows was also inferred from the ¹³C‐ and D‐depleted signature of CH₄ in the collected fluids. It was observed that the hydrothermal activity of the Dodo field had ceased until 2013.     

Initial Archaeological Survey of the ex-USS <Emphasis Type="Italic">Independence</Emphasis> (CVL-22)

The Boeing Company, collaborating with NOAA to address innovative ways to make ocean observations, provided their autonomous underwater vehicle, Echo Ranger, to conduct the first deep-water archaeological survey of the scuttled aircraft carrier USS Independence in the waters of Monterey Bay National Marine Sanctuary in March 2015. While a preliminary effort, and not comprehensive, the survey confirmed that a sonar feature (previously not proven to be an archaeological feature) charted at the location was Independence, and provided details on the condition of the wreck. At the same time, new information from declassified government reports provided more detail on Independence’s use as a naval test craft for radiological decontamination as well as its use as a repository for radioactive materials at the time of its scuttling in 1951. The wreck is historically significant, but also of archaeological significance as an artifact of the early years of the atomic age and of the Cold War. This article summarizes Independence’s contexts, its nuclear history, and the results of the survey of the wreck site.     

The Ethnocracy of the Palestinian Urban Space and the Indigenous Approach: Praxis and Theory

This article is a case study of the Palestinian recent past that produces a new knowledge on the maltreatment given to the archaeological remains of the Palestinians in the Late Ottoman period (18th to 20th centuries) by the dominant culture in Israel. The inequitable representation of the Palestinian-Ottoman heritage by the state creates both submission and resistance to the prevailing culture by the Palestinian citizens. The new knowledge created by this case study may be further used in order to understand the diverse experience of marginality of various contemporary dispossessed and displaced groups.     

Late Holocene Fauna from Kuidas Spring in Namibia

We present the results of faunal analyses from the recently excavated site of Kuidas Spring in north-western Namibia. The site includes rock shelters, stone circles and stone cairns. Stone circles, which were built during the last 1500 years, are widely distributed over much of Namibia and parts of the Northern Cape Province of South Africa. Current interpretations suggest that after the introduction of livestock 2300 years ago, hunter-gatherers who became herders built stone circle settlements. However, our results based on the faunal remains indicate that Kuidas Spring was exploited as a hunting resource, and whether or not herders with (or without their) livestock occupied or visited the site remains unconfirmed. We also found that gemsbok made use of stone circles at Kuidas Spring when these features were not inhabited and show how such activity might impact the interpretation of archaeological material.     

Mapping the Stone Age of Mozambique

Under the auspices of the Portuguese colonial government, Lereno Barradas and Santos Júnior (coordinator of the Anthropological Mission of Mozambique) carried out several archaeological field surveys from 1936 to 1956 that resulted in a data set that includes a total of close to 90 sites, mostly attributed to the Stone Age. This early research added to the previous work of Van Riet Lowe in the Limpopo Valley of southern Mozambique. With the new millennium, Mozambique has emerged as a crucial geographic area in which to understand the various hypotheses about recent human evolution. Specifically, its coastal location between southern and eastern Africa is ideal for testing ideas about the link between early coastal adaptations and the appearance of anatomically modern humans (AMH). Except for the recent work by Mercader’s team in northern Mozambique, the number of researchers and projects on this topic in Mozambique is still limited because of the general predominance of interest in later periods among archaeologists working in the country, mainly due to their focus on issues related to precolonial heritage and national identity. Based on the early maps from Santos Júnior and more recent data acquired through various projects, we present a series of maps for the Stone Age prehistory of Mozambique. The maps are also based on a critical evaluation of the sites and a review of some of the materials that are presently curated at the Instituto de Investigação Científica e Tropical (IICT) in Lisbon, Portugal, as well as the materials stored at the Department of Archaeology of Universidade Eduardo Mondlane, Maputo. The sites are also presented in an online database with the information on all sites used in this study. This database is open to all and will be updated continuously. A preliminary interpretation of the regional distribution of the sites is also attempted, linking aspects that include region, topography and altitude, geomorphology, and cultural phase. These results will be the first step for research and knowledge in Mozambique on Stone Age prehistory and the emergence and settlement pattern of AMH.     

Changing Crafts in the Spaces Between States: Formal,Functional, and Decorative Transformations in Fifteenth-Century CE Ceramics at Kirikongo,Burkina Faso (West Africa)

The fifteenth century CE in central West Africa saw the rise and/or expansion of states and empires, major shifts in settlement patterns, and growth of new trading connections between the forest and Sahel. However, very little is known about how these events affected areas not incorporated into states, such as western Burkina Faso, which was likely home to diverse noncentralized societies. Previous archaeological work at the site of Kirikongo, in the Mouhoun Bend, Burkina Faso, examined the histories of these communities from ca. 100 to 1400 CE. This paper introduces the fifteenth-century (Red IV) ceramics from Kirikongo, exploring their form, function, and decoration and assessing their presence at other sites in the region. Based on these distributions, many communities in the Mouhoun Bend decreased in size or were abandoned during Red IV. During Red IV, potters also adopted new ceramic forms and decorations. These may be associated with new economic activities and with increasing entanglements with Mande and/or Dogon communities.     

Animal Exploitation and Behaviour of the Latest Middle Stone Age Societies in the Middle Nile Valley: Archaeozoological and Taphonomic Analysis of Late Pleistocene Fauna from the Affad Basin,Sudan

With the research on the issue in its initial phases, the behaviour and hunting strategies of MSA communities inhabiting the Nile Valley in the Late and Terminal Pleistocene have been fragmentarily recognised thus far. Osteological materials from the area of the Affad Basin in the Middle Nile Valley, recorded in archaeological contexts and dated to the sixteenth millennium BP using OSL methods, have significantly enhanced our knowledge in this regard. It is the first time that an opportunity has occurred to construct a reliable model of the environment exploitation and the behaviour of human groups producing lithic tools using Levallois methods in the Terminal Pleistocene. Archaeozoological analyses have allowed the identification of taxa, species and anatomical origin of remains and enabled the establishment of a database of osteometric measurements. The animals hunted in the Sudanese Nile Valley during the Terminal Pleistocene have been classified with a view to refer the data to the results of analogous studies on MSA in South Africa. The behaviour of the communities occupying the Affad Basin 15,000 years ago was connected to the environment of the tree-covered, swampy savannah and extensive backwaters. Medium-sized antelope (kobus) was hunted most often. People hunted also, albeit less frequently, for large ruminants (buffalo), guenons and large rodents. Remains of fish and mega-fauna (hippopotamus and elephant) have been found in isolated concentrations, away from the camp sites. Remains of molluscs or ostrich eggs have not been registered. The condition of the osteological materials, notably their anatomical distribution, is shown to have been largely affected by wetland environment, rich in iron and manganese.     

Beware the Springbok in Sheep’s Clothing: How Secure Are the Faunal Identifications upon Which We Build Our Models?

Lively debate surrounds the introduction of non-indigenous domestic livestock to southern Africa. Despite disagreements regarding process, the archaeological community agrees, with unusual unanimity, on the broad chronology. Indeed, the certainty with which the timing is known (admittedly within the limits of radiocarbon dating) has been celebrated, because with these underpinning data in hand, issues of process can be explored in a serious and empirically grounded manner. Recently published ancient DNA (aDNA) research in southern Africa now calls into question the reliability of many faunal identifications upon which this debate rests. These data build on earlier ecological data, suggesting that some faunal identifications at sites crucial to the debate may be unreliable. A number of morphologically identified domesticate bones were chosen for aDNA sequencing to explore the relationships among southern Africa’s early domestic stock. Unfortunately, a large proportion yielded DNA sequences indicating a wild origin. This led us to consider the potential scale of the problem and the implications for existing models regarding the introduction of herding to the subcontinent. The issue may originate largely from the optimistic identification of specimens retaining too few key morphological markers. We acknowledge that reconstructions of the past are likely to be biased by discarding potential zooarchaeological data through overly conservative identification. We argue, however, that the potential ramifications of building models on unreliable data are far greater than those of being forced to acknowledge gaps in our data and are calling for further research.