Identifying Shell Middens With Historic Aerial Photos: An Example From California's Santa Cruz Island

Using 1929 aerial photos of western Santa Cruz Island, we identified numerous potential shell midden locations, followed by confirmation of site locations via field reconnaissance. Heavy grazing by sheep, cattle, and pigs closely cropped island vegetation in the early twentieth century, exposing shell middens now often covered with thick vegetation. We discuss the potential and limitations of early aerial photos as aids to archaeological site identification and management in island and coastal settings. Although results varied from island to island, we found historic aerial photos to be extremely useful for documenting previously unrecorded sites on Santa Cruz Island, ranging from historical EuroAmerican sites to Island Chumash sites dating to as much as 7250 cal BP. These methods may also be applicable to other islands around the world subject to heavy livestock grazing in the past, especially where introduced animals have been removed and recovering vegetation now obscures archaeological sites.     

Making a Mountain Out of a Molehill? A Low-Cost and Time-Efficient Molehill Survey of the Lost Medieval Harbor Site of Monnikerede,Belgium

Grasslands pose a particular problem for archaeological survey involving artifact assessment, as no material is plowed up to the surface. Although finds in molehills are often the only source of information available on sites with such low visibility, an archaeology of molehills has thus far been largely disregarded. Yet, by applying a low-cost and time-efficient methodology, both the potential and the pitfalls of molehill archaeology come to the forefront. At the medieval harbor site of Monnikerede, it was possible to assess material culture and to locate certain structural elements. However, when artifact densities were compared with the underlying geophysical anomalies, a more complex relationship appeared at the level of individual features.     

Detecting Cultural Remains in Boreal Forests in Sweden Using Airborne Laser Scanning Data of Different Resolutions

ABSTRACT

Airborne laser scanning (ALS) is increasingly being used to detect cultural remains in forest landscapes. Boreal forests are challenging, however, since most ancient land use was carried out without major permanent ground disturbances. If this challenge can be met, there is a large potential for surveys through existing nation-wide laser-scanning programs, although their resolutions tend to be low. In this study, we compare the performance of low-resolution (LR) and high-resolution (HR) ALS data in the Krycklan catchment in northern Sweden, an area where ancient land use was small-scale and diverse. About three times as many cultural remains were detected in the HR data set, but the LR set was satisfactory for distinct structures. We analyze how LR data sets can be enhanced at ground-point classification and terrain-model generation and conclude that ALS data have a large potential for the detection and protection of cultural remains in the boreal forest.     

New discoveries in the Piramide Naranjada in Cahuachi (Peru) using satellite,Ground Probing Radar and magnetic investigations

The detection of buried earthen structures by using remote sensing techniques is still an open issue and a strategic challenge as crucial as it is complex. It is crucial because earthen archaeological remains are widely present thoughtout the world (in South America, Asia, Africa) and it is complex due to the subtle physical contrast between earthen remains and the surrounding subsoil.     

Maritime Archaeology and the Early Atlantic Trade: research at Elmina,Ghana

This article details recent maritime archaeological research off the town of Elmina in coastal Ghana. Founded in 1482, Elmina Castle was the first and largest European outpost in sub‐Saharan West Africa, and remained a centre of maritime trade for almost four centuries. Survey and diver investigations led to the discovery of several sites, including a shipwreck dating to the mid 17th century, which is characterized by a mass of trade goods, cannon and buried hull remains. A second Dutch vessel dating to c.1700 was documented after its discovery during dredging operations in the Benya Lagoon adjacent to Elmina. These sites present an opportunity to study ships and cargoes involved in the West African trade.     

New Developments in the Use of Spatial Technology in Archaeology

Spatial technology is integral to how archaeologists collect, store, analyze, and represent information in digital data sets. Recent advances have improved our ability to look for and identify archaeological remains and have increased the size and complexity of our data sets. In this review we outline trends in visualization, data management, archaeological prospecting, modeling, and spatial analysis, as well as key advances in hardware and software. Due to developments in education, information technology, and landscape archaeology, the implementation of spatial technology has begun to move beyond superficial applications and is no longer limited to environmental deterministic approaches. In the future, spatial technology will increasingly change archaeology in ways that will enable us to become better practitioners, scholars, and stewards.     

GPR survey at Lapa do Santo archaeological site,Lagoa Santa karstic region,Minas Gerais state,Brazil

In this work we present and discuss the results of a novel and timely GPR-2D and GPR-3D survey performed at an archaeological rock shelter site, Lapa do Santo, localized in the karstic region of Lagoa Santa, central Brazil. A total of 113 ground-penetrating radar profiles were acquired with 200 MHz and 400 MHz shielded antennas aiming in identifying geological and archaeological anomalies in order to assist archaeologists in an excavation program. The GPR results indicated clear geophysical anomalies characterized by hyperbolic reflections and areas with high amplitude sub-horizontal electromagnetic waves. The anomalies observed by GPR were confirmed by the excavation of test units, allowing the identification anthropogenic features such as a fire-hearth structure and wooden artifact, and natural features, such as, tree roots and rocky bodies such as speleothems, boulders and bedrock. The results showed the efficiency of GPR method in identifying potential buried archaeological targets in cave sites within a karstic area, and they oriented to archaeological excavations, reducing costs and increasing the probability of finding archaeological targets in the initial stages of a project.     

Before Antikythera: the First Underwater Archaeological Survey in Greece

The aim of this article is to introduce to the international bibliography a report submitted to the Archaeological Society of Athens by Ephor Christos Tsoundas in 1885 summarizing what was to be the first state-sponsored underwater archaeological survey in Greece, and potentially the first such survey in general. A brief introduction is followed by a translation of the decision to conduct the survey, as well as of the final report submitted the following year. The fascinating insight which Tsoundas demonstrates in the report allows us a glimpse of the beginnings of underwater archaeology at the worthy site of the Battle of Salamis.
© 2006 The Author     

Assessment of fractures in some columns inside the crypt of the Cattedrale di Otranto using integrated geophysical methods

We investigate the problem of internal fracturing of the columns of a building of cultural importance (the Crypt of the “Cattedrale di Otranto”, Apulia, Italy), using a multi-disciplinary approach, integrating different non-destructive techniques (Microclimatic and Geophysical). In fact historic buildings, over centuries, may accumulate a high concentration of water and/or moisture that increases significantly the deterioration rate, diminishing the mechanical resistance.     

Optimum temporal and spectral window for monitoring crop marks over archaeological remains in the Mediterranean region

This paper aims to explore the formation of crops marks over archaeological features using remote sensing data. Crop marks are very important to archaeological research since they can reveal in an indirect way buried archaeological remains. Several researches have been able to locate subsurface relics via interpretation of multispectral and hyperspectral satellite images. However the best phenophase (time-window) where these crop marks are enhanced and which spectral bands are the most capable for this enhancement are still an open question for the scientific community. This study aims to address these fundamental aspects of Remote Sensing Archaeology. For this reason an extensive dataset was used: two control archaeological sites were constructed in two different areas of Cyprus (Alampra and Acheleia). In these areas both barley and wheat, were cultivated. In situ spectroradiometric measurements were taken over a whole phenological cycle (2001–2012) for both areas. More than 30 in situ campaigns were performed and more than 2600 ground measurements were collected. The phenological analysis of these measurements have shown that a period of only 15 days is best suitable for monitoring crop marks which is connected with one phenological stage; during the beginning of the boot stage of the crops. This period can be used in areas having similar climatic condition as Cyprus (Mediterranean region). Also as it was found, this phenological stage of crops might be also influenced by the climatic conditions of the area. The evaluation of a proposed Archaeological Index was performed at the Thessalian plain (central Greece), where several Neolithic settlements are established. The evaluation was made using both Hyperion and Landsat images. The results have shown that the proposed Archaeological Index is suitable for the enhancement of crop marks in satellite imagery.     

The spiral that vanished: the application of non-contact recording techniques to an elusive rock art motif at Castlerigg stone circle in Cumbria

This article describes the recording of stone 11 of the Castlerigg stone circle in Cumbria through two different non-contact techniques: laser scanning and ground-based remote sensing. Despite the unproblematic recording of modern graffiti, neither technique was able to document the spiral photographed and rubbed in 1995. It is concluded that the spiral was most probably painted and has since faded away due to natural events. The discovery and loss of the spiral motif in Castlerigg is seen as a cautionary tale. In particular, it seems to suggest that it is time to take advantage of the novel technologies based on the digitisation of 3D surfaces with millimetre and submillimetre accuracy such as laser scanning and ground-based remote sensing. They offer many advantages to the recording of prehistoric carvings. In addition to avoiding direct contact with the rock surface eliminating the preservation concerns raised by other techniques, both produce high quality images (laser scanning offering a greater potential for this, but at higher cost) having a much higher level of objectivity, and precision and accuracy far beyond those of traditional recording methods such as wax rubbings and scale drawings.     

北京历史文化街区现状及发展研究

以北京市西城区西四北头条至北八条和什刹海地区的300多份问卷调查结果显示:无论从历史发展规律、城市发展规律或人居环境科学视角分析,旧城区的改造都是必然的,居住于此的多数居民对于危房改造的态度是积极的,并且认同现代化建设可以与保护古都风貌相结合的观点。鉴于此,建议将传统历史文化街区分为三类,即完全原样保护的区域、住宅区和旅游商业区,在改造的过程中注意从总体上把握建筑外观、布局及周边环境与北京旧城风貌的协调。