A laboratory cave for the study of wall degradation in rock art caves: an implementation in the Vézère area

The aim of this proposal is to present an original approach to the study and preservation of rock art caves. A multidisciplinary study of cave wall alteration will be performed to understand the impact of environmental context on the evolution of wall surfaces. The approach involves the choice of a cave with characteristics similar to painted caves in the studied area (Vézère Valley in Dordogne, France): e.g., cave wall alteration, lithology, morphology, etc. This selected cave is intended to become a laboratory cave, monitored for the acquisition of chemical, physical and biological environmental data on bedrock, air and fluids along with their characteristics. A cave without art or archaeological interest has been chosen specifically to conduct experiments, to make in situ analysis and to obtain samples. The results are to be completed by specific observations in several other caves and compiled in a database.     

The new Siberia

This paper assesses relationships between Scottish ice climbing and daily weather conditions between 1961 and 1990. Synoptic air flow and instrumental climate data from Braemar and Fort Augustus were analysed in relation to first ascents of ice climbs in the Cairngorms, and on Ben Nevis and Creag Meagaidh. Lagged weather variables were calculated and stepwise logistic regression was used to estimate optimum models for both areas. Significant variables are anticyclonicity, low minimum air temperature and northerly or easterly airflow (Cairngorms, P = 0.0006); and northerly or easterly airflow, low minimum air temperature and low precipitation (Ben Nevis and Creag Meagaidh, P < 0.0001). A five‐day cold spell is optimum for Ben Nevis and Creag Meagaidh. A week with relatively little precipitation is beneficial in both areas. Air flow direction is more influential than vorticity, the optimum predictors of ice conditions using synoptic data alone are a persistent easterly component (beneficial), and a persistent southerly and westerly component (detrimental), P < 0.0001.     

Discussion on the variation characteristics of water content of Quaternary soil cover on the top of Yungang Grottoes and the problem of water seepage in caves北大核心

为研究云冈石窟顶部土壤覆盖层的含水率变化情况,建设了土壤环境监测网收集云冈石窟土壤含水率实时监测数据,并分析其时空变化特征及影响因素。结果表明,平坦地形条件下云冈石窟顶部第四纪土壤覆盖层含水率时空变化特征明显:年变化具有周期性,垂向上随深度逐层降低(冬季除外)。春、夏季土壤含水率抬升、储水,秋、冬季下降、失水;在春、夏日土壤含水率呈白天上升、夜晚下降趋势,秋、冬日则呈白天下降、夜晚也下降趋势。土壤含水率时刻处于不停的运动变化之中,受温度、大气降水、微地形等众多因素影响,山体边坡浅层土壤可能为侧向饱和流的入渗通道。降雨对土壤含水率的影响深度与实际入渗深度不一致。云冈窟内顶板及岩壁上部、中部含水率主要受降雨渗透窟顶土壤层、沿岩体裂隙通道进入洞窟的渗漏水控制,而岩壁底部含水率更多受窟前不饱带和与地下毛细水的影响。多年的防水实践也证明云冈洞窟渗漏水主要来自于石窟顶部及附近区域。防渗排水始终是云冈洞窟渗漏水治理的主导思路,建议应根据窟顶土壤厚度、地形地貌和遗址分布等分区治理,充分发挥土壤的防渗作用,减少对土壤覆盖层的过度干预。防渗层材料在具有防渗作用的前提下,应具备一定的透气性,满足“洞窟—覆盖层—大气环境”之间的水汽循环。     

莫高窟108窟内空气温湿度的变化过程及其对窟内水汽和热量来源的启示

为了对108窟内不同位置的温度、湿度和空气压力进行监测,设置了12个点的传感器。监测结果表明,窟内温度存在着显著的昼夜和长期的变化,其中上层空气的温度变化尤其明显,而下层空气的温度变化则相对较小。在夏天,窟内的上层空气温度高于下层空气的温度。窟内空气的绝对湿度受外部环境严重影响,存在近似昼夜的变化。在分布上,窟内空气湿度在上层和前部高,而在下层和后部则较小。窟内存在着净的水汽输入过程,但水汽不是从洞窟的入口进入的。同样,窟内的空气压力也存在着明显的昼夜变化过程,并受外部环境的影响而升高或下降,窟内东侧的空气压力大于西侧的空气压力。这些结果一致说明,在108窟的东侧上层存在着水汽和热量的来源。研究结果为下一步的盐害防治工作提供了思路,具有重要的科学意义和应用价值。     

Microclimate analysis of deteriorated wall paintings: With restitution of original decoration through imaging

Abstract

The restoration of deteriorated wall paintings in an underground environment requires at the outset a complex analytical approach designed to clarify the deterioration processes. These can be identified and prioritized using continuous microclimatic monitoring with multichannel analytical loggers, providing abundant data on climatology, airflow and hydrogeology in real or semireal time. The investigator can therefore have an almost instantaneous idea of the evolving microclimatic conditions of the monument, identifying among other variables the condensation or evaporation phases of the walls and the rising or sinking of the underground water table when the monument ‘has its feet in the water’, as in the case described here of St Emilion (France). In addition, electronic image capture in situ can be used to decode and restitute very damaged paintings that have become difficult to read, with a view to their being eventually presented to the public.     

Joshua’s Tomb

Abstract

Following the recent excavations of the Jerusalem 'Warren's Shaft System' and its attribution to the Middle Bronze II period, the authors re-evaluate the dating of the Gezer water system. R. A. S. Macalister attributed it to the 'Second Semitic' period, which roughly corresponds to the ME II period. Several scholars challenged this dating, suggesting a lower date in the Late Bronze or the Iron Age. The article draws attention to a detail which escaped the types of scholars, namely that the cave at the bottom of the system has in fact a lower outlet, to the tell's southern perimeter. This detail appears on a plan and section drawn by L Vincent, when visiting the excavation. This explains how the miners knew where to locate the entrance to the system within the city's boundary, and to what direction and angle to aim their tunnel to hit that cave. This increases the similarity between the Jerusalem and the Gezer water systems, and corroborates the MB II dating for the Gezer system, originally suggested by Macalister.     

3D imaging of Skoteino Cave,Crete, Greece: Successes and difficulties

Abstract

Interpreting cave use, especially from antiquity, requires the perception of subterranean space in all dimensions (floor to ceiling to lateral extent) including spatial variability resulting from geological factors. Subterranean conditions, coupled with variable atmospheric conditions, create a special environment not readily conveyed by conventional mapping techniques limited to two-dimensional floor plans. Skoteino Cave in north central Crete, Greece was used as a ritual and refuge site in the Bronze Age and later. Mapping of the cave attempted to depict and interpret prehistoric and historical use of this space by employing two mapping techniques: EDM total station mapping and terrestrial/point cloud laser scanning. Comparisons with earlier methods used to map cave show the advantages and disadvantages of various mapping schemes. To date, this was the first use of three-dimensional (3D) scanning to explore the complex shapes and space of a subterranean archaeological site on Crete (and the second such use in Greece), and this use demonstrates its own consequent successes and difficulties.     

New light on the prehistoric Purrón Dam Complex: Small corporate group collaboration in the Tehuacán Valley,Puebla, México

Abstract

The 2003 and 2004 surveys at the Purrón Dam Complex (PDC) demonstrate the value of resurveying previously studied areas. Additional habitation sites, water management features, a cave with pictographs, and a major canal were discovered, increasing the number of recorded sites from eight to 57. From this survey, the collected ceramics and a synthesis of 12 chronometric dates suggest that water management was initiated in the complex by Early Formative times at ca. 1050–1100 b.c., and that the Purrón Dam was completed by the Middle Formative Period (ca. 650–450 b.c.), when settlements were small and decentralized. This challenges previous interpretations that place the PDC florescence during the Early Classic Period (ca. 150 b.c.–a.d.250), a period with larger aggregated communities displaying social ranking. The results of our survey have implications for understanding the links between political complexity and agricultural intensification, and support recent ethnographic and archaeological research discrediting the argument that increasing social complexity necessarily leads to the construction of large water management systems.     

Roman sarcophagi at the lower terrace of Amman Citadel

ABSTRACT

A rock-hewn cave cut out of limestone was accidentally discovered in 2012 during road repairs and maintenance work conducted by Great Amman Municipality on the corner of the street leading to the Amman Citadel. The recommendations were to conduct a salvage excavation at the above-mentioned cave. Therefore, an immediate physical inspection was conducted in order to assess the needs of excavating and to avoid further collateral damage. The campaign for the excavation of the cave took place between 22 February and 10 March 2012. Two limestone sarcophagi from the Roman period were found in the cave. The stone coffin is one of several types of the burial customs known to the Romans whether in the Near East or in their original homeland. The social and economic conditions of the people during the Roman Period determined the quality of their tombs, the funerary rites to be held and the funerary tools accompanying them in the other life. Consequently, people belonging to poor families are deprived of the same quality of services in comparison to their rich counterparts.     

Prehistoric Footprints in Jaguar Cave,Tennessee

Abstract

About 4500 years ago, during the Late Archaic period, nine explorers reconnoitered several passages within a large cave in north central Tennessee. Although prehistoric cave exploration was not unusual in eastern North America, this particular trip is unique because 274 footprints of these ancient cavers are preserved in the damp floor sediment of a side passage. Analyses of the route taken by the explorers, and of their footprint trail significantly enhance our knowledge of cave use in prehistoric eastern North America.     

New evidence for the Mousterian and Gravettian at Rio Secco Cave,Italy

Abstract

The dearth of evidence for late Neanderthals in Europe reduces our ability to understand the demise of their species and the impact of the biological and cultural changes that resulted from the spread of anatomically modern humans. In this light, a recently investigated cave in the northern Adriatic region at the border between the Italian Alps and the Great Adriatic Plain provides useful data about the last Neanderthals between 46·0 and 42·1 ky cal b.p. Their subsistence is inferred from zooarchaeological remains and patterns in Middle Palaeolithic lithic technology. Unexpected evidence of the ephemeral use of the cave during the early Upper Palaeolithic Gravettian period shows a change in lithic technology.     

送风方式对文物保存展柜微环境气流分布的影响

为研究不同送风气流组织形式对博物馆内文物展柜微环境的影响,采用数值模拟的方法对博物馆内卧式和立式展柜不同形式的下送下回通风方式进行数值模拟。结果表明,下送下回的送回风方式能够减少冷量且气流在内部区域有效混合扩散。送风口设置在长度方向中心时,气流在展柜内可以充分混合。送风口必须设置在宽度方向时,采用小流量可以有效在整个空间扩散,形成充分的空气环流。如果展柜内有热源,简单通过增加风量的方法并不能有效降低温度,送风特性需进一步研究。     

Chatsworth Street Cutting,Part of the Original Terminus of the Liverpool and Manchester Railway

Abstract

Recent surveys of textile mills in Yorkshire, Greater Manchester and East Cheshire have laid the groundwork for future study in their respective areas. All three have necessarily referred back to precedents set in eighteenth century Derbyshire, where water power was first successfully applied to the manufacture of both silk and cotton. Derbyshire retains an important group of early cotton mills, most of them distributed along the River Derwent and its tributaries. Recent measured surveys of five of the most significant early mills and of a number of related sites by RCHME's Threatened Buildings Sections, supplemented by photographic coverage of further sites over many years, have provided a core of information on which the present article is largely based. The article concentrates on the surviving physical remains of the cotton industry, but draws also on documentary and other evidence for vanished structures.     

游客量对炳灵寺第128窟微环境影响初步研究

通过对炳灵寺石窟第128窟连续一年的微环境监测数据分析,结合游客参观统计,探究了游客量对炳灵寺第128窟微环境的影响;其中CO₂浓度与游客量呈正相关,窟内外温差越大,其衰减越快。洞窟温度升高与游客量呈一定程度正相关,温度增量主要为正值,负值与气象条件相关,温度的衰减与温度增量及窟内外温差正相关。窟内相对湿度变化较为复杂,监测期间游客参观对相对湿度影响在-5%～10%范围内,以降低窟内相对湿度为主。研究结果表明,目前的开放模式有助于CO₂浓度衰减,可适当扩大每批次参观人数至10人左右,以应对大客流状况;注重旅游旺季特别是5月、9月下旬至10月中旬时间段洞窟内相对湿度变化的监测,做好游客管理和洞窟相对湿度控制应对措施。本研究对于炳灵寺石窟第128窟及其他相似洞窟的旅游开放管理具有一定指导意义。     

Spray Foam: a New Bone Encasement Technique

Abstract

A new method of encasing broken bone materials is tested on human skeletal material from a wet cave in sw Texas.     

Concentrations of H2O and NO in the mesosphere and the lower thermosphere at high latitudes

Water vapour and nitric oxide concentrations in the mesosphere and lower thermosphere were derived from infrared emission and positive ion composition measurements above northern Europe during the Energy Budget Campaign 1980. The experiments were performed at different levels of geomagnetic disturbance. Both water vapour and nitric oxide are highly variable. Water vapour mixing ratios between 0.2 ppm and 10 ppm were observed. The nitric oxide peak densities varied by more than a factor of ten. Maximum values of 2 × 10⁹cm⁻³ were obtained.     

Economics and environmental change during the Late Mesolithic and Neolithic periods — investigations in the valley of the Gieselau near Albersdorf,Schleswig-Holstein,Germany

Abstract

Interactions between people and the environment have resulted in constant changes in relief and soil conditions since the Neolithic. Soil transport and degradation had considerable effects on human land use. Extensive field investigations (excavations, auger sampling), measurements (e.g. texture, pH-value, C_org, N), datings (¹⁴C, pottery), together with extensive literature searches in different scientific disciplines (archaeology, palaeoecology, palaeoclimatology etc.), made it possible to reconstruct the Holocene landscape development in four study areas along the valley of the Gieselau near Albersdorf (Schleswig-Holstein, Germany). Stratigraphies were established in the study areas. This paper describes landscape developments around Albersdorf and in northern Central Europe during the Late Mesolithic and Neolithic. The compiled data for the landscape and land-use history serve as a basis for the design of the extensive Archaeological-Ecological Centre Albersdorf (AÖZA) — occupying a site of approximately 40 hectares — using reconstructed features from the Neolithic landscapes.     

Pre-Pottery Neolithic A and Late Natufian at 'Iraq ed-Dubb,Jordan

Abstract

Excavations at the cave of Traq ed-Dubb, Jordan, help clarify our understanding of the transition from foraging to farming in the Near East. The people who occupied the site in the Late Natufian period (13,500–11,500 B.P) were a relatively mobile group who used the cave as a temporary base camp for local foraging and hunting. In contrast, the occupants in the Pre-Pottery Neolithic A period (11,500–10,500 B.P) constructed at least two stone residences, with food processing features, inside the cave. This study provides a detailed consideration of the timing of the earliest sedentary farmers at Traq ed-Dubb, and elucidates the nature of differences in architecture between these periods, reflecting upon the implications of the transition to food production, which appears to have taken place less rapidly than previously assumed.     

Design and evaluation of hydraulic lime grouts for the reattachment of lime plasters on earthen walls

Abstract

A laboratory and field testing programme for the formulation and evaluation of hydraulic grouts was developed for the reattachment of lime plasters on earthen (adobe) walls. Formulations utilizing kaolin, hydraulic lime, ceramic microspheres, and fine silica sand, with and without the addition of an acrylic emulsion, were prepared and evaluated in a three-stage testing programme. Standard tests were employed to measure injectability, viscosity, set time, shrinkage, weight, splitting/tensile strength, water vapour transmission rate, and adhesive bond strength. Grout microstructure was comparatively examined using scanning electron microscopy. Of the 18 grout formulations tested, only one mixture composed of (parts by weight) 1 part microspheres, 1 part sand, 2 parts hydraulic lime, 10% part acrylic emulsion was found to meet all the essential performance criteria established.