Settlement and environmental history of a multilayered settlement mound in Niederröblingen (central Germany) – a multi-proxy approach

A multi-disciplinary palaeoecological approach on a sequence of dated archaeosediments was accomplished. The sediments derive from a multilayered prehistoric settlement mound in central Germany, representing the remnants of a prehistoric village. Based on the analysis of biological remains and geochemical/physical analysis of the settlement layers its environment was reconstructed. There is a trend to increasing anthropogenic activities and impact on the environment represented through a rise of indicators for productive surplus from the Early Neolithic (5300–4900 BC) until the Roman Times (400 AD). During the Early Neolithic, shifting flat settlements were situated in a locally opened landscape. The immediate surrounding of the floodplain was used by the settlers for their economic requirements (e.g. wood from the riparian forest). After a hiatus of ca. 1900 years, a multilayered settlement mount rose from Late Neolithic Times (3000 BC) to Roman Times. Since the Middle Bronze Age (approximately 1500 BC) the riparian forest was obviously replaced by agricultural fields and meadows and henceforward the hinterland used by the settlers probably grew in size. The continuing demand of wood was maintained by the acquisition of more distant sources. The onset of house constructions substituting wood by loam (wattle and daub) might be a possible societal response to this shortfall. This is reflected in the growing thickness and composition of the settlement layers, as well as in the archaeological record (e.g. tumbled wattle and daub house walls). The rising of the groundwater table and the start of severe floods of the adjacent river Helme during pre-Roman Iron Age (approx. 800–100 BC) might reflect a geomorphological response to the increased land use intensity at a regional scale.     

How the Olmec used bitumen in ancient Mesoamerica

Bitumen, found in abundance in Mesoamerica’s southern Gulf Coast region in natural seeps and in many archeological contexts, is an important economic resource and exchange item that has received little consideration in Mesoamerica. Analyses of archeological, ethnoarcheological, and experimental data provide insights on the organization of bitumen processing activities, and the end product (archeological bitumen), which the Olmec (1200–400 BC) used in the production of many items. Archeological data are derived from investigations at El Remolino and Paso los Ortices— two Early Formative period levee sites in the San Lorenzo Olmec region. Our findings suggest that among the Olmec, bitumen processing was organized as a specialized activity, involving multiple production stages, but not necessarily elite involvement or control.     

南京长江大桥桥头堡抗震加固受力性能研究

为研究南京长江大桥桥头堡填充墙加固对结构抗震性能的影响,提出考虑较高填充墙开裂的双斜撑模型,用于罕遇地震工况下桥头堡的抗震性能计算,同时提出考虑填充墙加固后刚度增强效应的建模方法。利用SAP2000建立了加固前后用于多遇地震工况、设防地震工况及罕遇地震工况的分析模型,并选取了桥头堡在1974年经历的实际地震激励时程及El-Centro地震激励时程作为激励进行了加固前后结构的抗震性能分析比较。研究发现,填充墙加固后桥头堡的抗震性能有了明显提升,其位移响应峰值约下降8%~23%,层间位移角响应峰值约下降12%~22%,而且桥头堡结构在设防地震情况下2个方向的层间位移角均满足了规范要求。另外,在罕遇地震工况下,未加固的填充墙开裂会使结构的扭转刚度下降,而填充墙加固可有效提升结构的扭转刚度,降低桥头堡在地震时发生扭转振动的概率。这2种地震荷载激励的分析结果差异约在3%~21%不等,且响应峰值出现的位置也有一些不同,故对桥头堡进行抗震时程分析时建议选取多条地震波输入综合分析。研究成果可为同类型的钢筋混凝土建筑遗产的抗震加固提供借鉴和参考。     

Strofilas (Andros Island,Greece): new evidence for the cycladic final neolithic period through novel dating methods using luminescence and obsidian hydration

The recently excavated coastal prehistoric settlement of Strofilas on Andros Island (Cyclades, Greece) in the Aegean sheds new light on the transitional phase from the Final Neolithic to Early Cycladic period regarding masonry, fortification, and richly engraved rock art. The fortification possesses early evidence of preserved defensive architecture, as evidenced from the plethora of scattered finds from within and around the settlement. Important features are carvings on rock walls which mainly depict ships, animals, and fish. Initial archaeometric dating via the application of luminescence dating of two samples from the fortified wall bearing engraved ships, and by obsidian hydration of two blades employing the new SIMS-SS method (secondary ion mass spectrometry via surface saturation), has been undertaken to determine the site's chronology. The former yields an average date of 3520 (±540) BC and the latter an average date of 3400 (±200) years BC, both of which, within overlapping errors, suggest the main settlement occurred during the Final Neolithic.     

A radiocarbon chronology for Sāmoan prehistory

The corpus of radiocarbon dates for Sāmoan archaeology has grown exponentially since the pioneering work of Green and Davidson in the 1960s, enabling us to re-analyze the archipelago's cultural chronology. A reliable and valid radiocarbon chronology forms the basis for describing and explaining cultural variability and change in the central Pacific. Towards that end, in this paper we compile the available radiocarbon dates from published and unpublished (“grey literature”) sources. We critically evaluate 236 radiocarbon dates following a chronometric hygiene protocol to identify the most secure and reliable age estimates. We accept 147 dates (62.3%) as a means of addressing two significant issues for Sāmoan prehistory: (1) the chronology of settlement and human expansion across the archipelago pre-2000 cal BP, which relates to issues of Lapita colonization, and the effect of island geomorphology on settlement; and (2) analysis of the so-called “Dark Ages” (ca. 1500–1000 cal BP), a period relevant to issues of social complexity and East Polynesian settlement. Our research highlights the need for a rigorous sampling protocol for radiocarbon dating.     

Mobility in Central European Late Eneolithic and Early Bronze Age: tibial cross-sectional geometry

An absence of settlement features during the Central European Corded Ware period (Late Eneolithic, 2900–2300 BC) has been interpreted as a reflection of mobile pastoral subsistence. Recent analyses of the Late Eneolithic archeological context reveal that the Late Eneolithic exhibit evidence of sedentary agricultural activities similar to the Early Bronze Age. Since the archeological analyses are not clear cut, we tested mobility pattern differences between the Late Eneolithic and Early Bronze Age using biomechanical analysis of the tibial midshaft cross-sections. The total sample of the 130 tibiae representing five archaeological cultures was used. The results of the tibial midshaft geometry do not support the hypothesis about different mobility in the Late Eneolithic and Early Bronze Age. This conclusion is supported by nonsignificant differences between the Corded Ware females and the Early Bronze Age females. Higher absolute values for the Corded Ware males should be explained either by stochastic variation or by differing amounts of physical demands despite a generally similar pattern of subsistence of the Late Eneolithic and Early Bronze Age. One of the Early Bronze Age samples, the Wieselburger group, is an exception because the individuals show both reduced overall size and bending resistance of the tibial parameters not only in comparison with the Late Eneolithic but also to the rest of the Early Bronze Age. The results suggest that the behavioral processes which affected the tibial midshaft biology operated during the Late Eneolithic and Early Bronze Age as a mosaic across time and between/within cultures.     

Simulation for Ludian (August 3, 2014, MW 6.2) and Nepal (April 25, 2015, MW 7.8) Earthquakes with Improved Stochastic Point Source Method

The Ludian earthquake (M_W 6.2) and Nepal earthquake (M_W 7.8) are parameterized and then simulated using a new improved version of the stochastic point source method based on a proposed equivalent distance (R_EQL) measure. The improved method considers uniform slip distribution along the fault and is validated by comparing the simulated Fourier response spectrum. Simulated ShakeMaps of Ludian and Nepal earthquakes in terms of PGA also indicate that the results of the improved method are in good agreement with finite-fault method with high efficiency.     

The Evolution of Pottery Production During The Late Neolithic Period at Sialk On The Kashan Plain,Central Plateau of Iran

The prehistoric sherds recovered from the North Mound of Tepe Sialk were investigated using XRF, XRD and SEM/EDX analyses. These studies showed the occurrence of a gradual evolution in pottery‐making from the Sialk I to Sialk II periods, eventually leading to the production of bulk red pottery at the final phase of Sialk II. The relative similarity of compositions, homogeneous microstructures and the presence of high‐temperature phases demonstrated a high degree of specialization in the selection of raw materials and control of the firing temperature and atmosphere among the potters of Sialk in the sixth millennium bc , peaking at the final phase of Sialk II.     

Seleucia Pieria: an ancient harbour submitted to two successive uplifts

Historical sources ascribe the foundation of Seleucia (Seleukeia) Pieria to Seleucos I Nikator, shortly before the foundation of Antioch in the late 4th century BC. The Seleucia Pieria site seems however to have been inhabited earlier, perhaps from around 700 BC, possibly by a Greek population under an Assyrian ruler. The city became of considerable military importance during the wars between the Ptolemies and the Seleucids; it was occupied by the Romans in the 1st century BC, but had practically disappeared in the 6th century AD.
Geomorphological surveys in the area have revealed the existence of elevated marine notches and rims bioconstructed by vermetids, oysters and calcareous algae, which occasionally erode or intersect the archaeological sites, showing that two rapid land uplift movements, probably of seismic origin, took place during the late Holocene. The first movement, which occurred about 2500 ± 100 years bp, was the strongest one and caused a local vertical displacement of about 1.7 m, which may have severely affected the earlier Greek settlement. Though several earthquakes are reported to have occurred in the area during the following ten centuries, none of them seem to have been strong enough to cause significant vertical displacements. The second movement occurred around 1400 years bp, probably in May 526 AD, when a great earthquake followed by tsunami waves is known to have caused devastating damage in Antioch and Seleucia. According to geomorphological data supported by several radiocarbon dates, the earthquake was accompanied by a 0.7 to 0 8 m upheaval. This seismotectonic event also caused a rapid silting of the Seleucia Pieria closed harbour basin and entrances, thus preventing its further use.     

The nature of third-millennium settlement: The example of al-Tikha (Rustaq) an Umm an-Nar site on the Batinah coast of Oman

al-Tikha is a mid to large Umm an-Nar (c. 2700–2000 BC) settlement situated near Rustaq at the back of the Southern Batinah coastal plain in the Sultanate of Oman that was discovered (or rediscovered) in 2014. The site is unique because its layout and spatial organisation are very largely (possibly completely) visible on the surface. This includes two separate areas of stone-built housing, a large pottery scatter of varying density, three or four typical Umm an-Nar round towers and a small cemetery consisting of at least four tombs, along with a few other features. The layout of the site is described and discussed in detail, in particular, in relation to what it might tell us about the nature of Umm an-Nar settlement and social organisation more generally. The location of the site within a pattern of repeating Umm an-Nar settlement along Wadi Far (Wādī al-Farʿī) is also described and discussed.     

Husbandry practices and livestock dung at the Numidian site of Althiburos (el Médéina,Kef Governorate,northern Tunisia): the phytolith and spherulite evidence

Recent excavations at Althiburos, northern Tunisia, have shown the existence of permanent pre-roman occupations in the central area of the urban settlement. Significantly, the site has been found to contain one of the most complete Numidian sequences, spanning from the Early Numidian (at least from the 10th–9th century BC) to its final stage. Research at the site addresses questions related to the identification of settlement patterns at this time.The combined study of phytoliths and spherulites recovered from well defined archeological contexts at the site have provided new data for identifying husbandry activities carried out by the ancient Numidian populations. The results show that there is abundant evidence for both cooking and processing cereals, primarily from common or bread wheat (Triticum aestivum). Also significantly, was the abundance of faecal spherulites in certain areas of the site, indicative of dung accumulation. The correlation between large amounts of spherulites and rich phytolith sediments in specific contexts, suggested that grasses were brought to the site or consumed offsite and deposited onsite as livestock dung or dung-products. The identification of dung accumulations in the site raises questions about the diversity of economic practices developed by Protohistoric communities in northern Africa. Future research questions regarding such dung rich layers will also be examined.     

Bystry Kulyogan-38 –Bronze Age Fortified Dwelling In The Surgut Ob Area

In 2000, archaeologists from Yekaterinburg and Surgut excavated the preserved portion (380 sq. m) of the Bronze Age fortifi ed settlement situated on the Bystry Kulyogan River, right bank of the Ob River, 35 km west of Surgut. The settlement was initially estimated to be approximately 650 sq. m in size. An isolated dwelling was located on a small sandy promontory. It was protected by an arcuate moat and probably by a palisade along the perimeter. The dwelling is rectangular in plan and resembles a tall truncated pyramid with rounded angles. It is characterized by a frame-pole construction with vertical load bearing posts, inclined log and pole walls, and fl at or very low gable roof similar to those encountered among traditional Khanty surface dwellings or above grave structures. Walls were fi xed by sandy mounds along the outer perimeter. The largest portion of the dwelling was occupied by a rectangular pit with vertical walls 0.4–0.9 m high sheeted with half-beams or half-section timber. Plank beds were located along the walls. The elevated shelf between the pit and walls was used to store kitchen utensils, tools, and provisions. The Bronze Age assemblage includes 33 stone artifacts and 1640 fragments of at least 25 Kulyogan type vessels. Vessels are jar-like with fl at bottom, decorated with comb and pit patterns. The site is preliminarily dated to the fi rst half or the fi rst third of the 2nd millennium BC.     

SEISMIC HAZARD ASSESSMENT OF METROPOLITAN TEHRAN,IRAN

This paper presents a probabilistic seismic hazard assessment of Tehran, the capital of Iran. Two maps have been prepared to indicate the earthquake hazard of Tehran and its vicinity in the form of iso-acceleration contour lines. They display the probabilistic estimate of Peak Ground Acceleration (PGA) over bedrock for the return periods of 475 and 950 years. Tehran is a densely populated metropolitan in which more than 10 million people live. Many destructive earthquakes happened in Iran in the last centuries. It comes from historical references that at least 6 times, Tehran has been destroyed by catastrophic earthquakes. The oldest one happened in the 4th century BC. A collected catalogue, containing both historical and instrumental events and covering the period from the 4th century BC to 1999 is then used. Seismic sources are modelled and recurrence relationship is established. For this purpose the method proposed by Kijko [2000] was employed considering uncertainty in magnitude and incomplete earthquake catalogue. The calculations were performed using the logic tree method and three weighted attenuation relationships; Ramazi [1999], 0.4, Ambraseys and Bommer [1991], 0.35, and Sarma and Srbulov [1996], 0.25. Seismic hazard assessment is then carried out for 12×11 grid points using SEISRISK III. Finally, two seismic hazard maps of the studied area based on Peak Ground Acceleration (PGA) over bedrock for 10% probability of exceedance in two life cycles of 50 and 100 years are presented. The results showed that the PGA ranges from 0.27(g) to 0.46(g) for a return period of 475 years and from 0.33(g) to 0.55(g) for a return period of 950 years. Since population is very dense in Tehran and vulnerability of buildings is high, the risk of future earthquakes will be very significant.     

Geodynamic processes in the NW Bohemian swarm earthquake region,Czech Republic,identified by continuous gas monitoring

The time series of two continuously operating gas monitoring stations at Oldřišská and Nový Kostel located along seismoactive faults in the epicentral area of the NW Bohemian swarm earthquakes (Czech Republic) are compared with water level fluctuations in two boreholes positioned along these faults and with gas flux variations of a mofette at the Soos mofette field at 9 km distance. The seasonal trend of the monitored CO₂ concentration with a maximum in November and a minimum in March/April is governed by groundwater temperatures, superimposed in spring by soil temperatures. CO₂ concentration variations identified at Oldřišská are also reflected in gas flux variations in the Soos mofette and/or water level fluctuations of two boreholes. Variations in the gas monitoring recordings of station at Nový Kostel are also linked with variations at Oldřišská. In all data sets, diurnal variations generated by earth tides occur, reflecting a daily stress – fault permeability cycle. Additional stress interferes with this cycle. Significant, abrupt changes are attributed to geodynamic processes linked with seismic events, as revealed by local seismicity or by the transient of waves of a strong remote earthquake. Simultaneous variations of the gas concentrations in the Nový Kostel area and in the gas flux in the Soos point to an interconnected hydraulic conductive fault systems present in the northern part of the Cheb Basin. Sharp falls in gas concentration, during or subsequent to, earthquake swarms may reflect fault compression associated with impeded gas migration. However, gas variations also occur in periods without seismic activity, indicating changes in fault permeability were caused by local aseismic fault movements, as revealed by events with opposite trends in the gas recordings at Oldřišská, Nový Kostel and the Soos. Therefore, a mathematical approach to establish a correlation between seismicity and gas geochemical variations is not possible.     

Analysis of strain‐induced ground‐water fluctuations at Devils Hole,Nevada

The pool in Devils Hole is a sensitive indicator of crustal strain and fluctuates in response to changes in atmospheric pressure, earth tides, earthquakes, large‐scale tectonic activity and ground‐water development. Short‐term and cyclic water‐level fluctuations caused by atmospheric pressure and earth tides were found to be on the order of millimeters to centimeters. The 1992 Landers/Little Skull Mountain earthquake sequence and the 1999 Hector Mine earthquake induced water‐level offsets of greater than ?12 and ?3.6 cm, respectively. The results of a dislocation model used to compute volumetric strain for each earthquake indicates that the coseismic water‐level offsets are consistent in magnitude and sense with poroelastic responses to earthquake‐induced strain. Theoretical postseismic fluid‐flow modeling indicates that the diffusivity of the system is on the order of 0.03 m² sec^?1, and identified areas of anomalous water‐level fluctuations. Interpretation of model results suggests that while the persistent post‐Landers rise in water‐level can be attributed to deformation‐induced channeling of fluid to the Devils Hole fault zone, the cause of the pre‐Hector Mine water‐level rise may be related to postseismic excess fluid pressures or preseismic strain accumulation.     

Geophysical investigations in the service of Mount Carmel (Israel) prehistoric research

Geophysical investigations in el-Wad Cave, Mount Carmel, Israel, enabled the mapping of the surface of the bedrock and a reconstruction of the depth of the archeological deposits. Seismic refraction and Ground Penetrating Radar (GPR) provided similar results, indicating the potential value of geophysical studies when one seeks to reconstruct site features and establish future excavation strategies. Results of a GPR survey later conducted in the adjacent Jamal Cave were supported, to a high degree, by subsequent archeological excavations in the course of which Lower and Middle Paleolithic layers were unearthed.A Continuous Vertical Electrical Sounding (CVES) geoelectric survey in the (collapsed) Misliya Cave indicates a low resistivity layer at the upper, central part of the cave, suggesting that lithified archeological deposits, of ca. 4 m, are preserved at the site. This has been supported by a test excavation recently conducted at the site.More intriguing is the case of what, on the basis of the outer morphology of the cliff, seemed to be another collapsed cave just to the north of el-Wad. The CVES survey, at the bottom of the cliff and across the hypothesized cave (or chamber), shows a two-layer model, with a low resistivity (100–200 ohm-m) layer, overlying a layer of high resistivity (8000–10,000 ohm-m). A trial trench indicates that here the bedrock is covered by shallow, recent, surface material, with no archeological value.All three methods of geophysical investigation proved applicable and resulted in the successful evaluation of sites' location, depth and spatial extension, thus forming essential tools in future prehistoric research.     

Lipid residue analyses of Early Neolithic funnel-beaker pottery from Skogsmossen,eastern Central Sweden,and the earliest evidence of dairying in Sweden

This study address the question of the use and function of Early Neolithic (4000–3000 cal. BC) funnel-beaker pots from Mälardalen in eastern Central Sweden. The material studied is pottery from a wetland offering at the site Skogsmossen in the province of Västmanland. While deposited under ritual circumstances in a fen, the pots were likely used in a domestic domain on the settlement adjacent to the offering fen, prior to final deposition. The lipid analysis indicate a varied vessel use, there are traces of aquatic resources, plants, terrestrial animals and milk. The identification of milk residue is the oldest so far from Sweden.