Approche multi-méthodes expérimentale pour l’étude d’un site d’occupation romaine et médiévale à Horbourg-Wihr

International audienceThe study presents geophysical surveys and archaeological excavations that complete each other to fulfil two objectives: 1- to understand the evolution of the human occupation from Roman to Medieval times on an archaeological site in Horbourg-Wihr (Haut-Rhin, France); 2- to test the efficiency of an approach using a combination of different geophysical methods and targeted excavations for the assessment of archaeological remains. The use of different geophysical methods is shown to be particularly adapted to the context of the archaeological site. The results allow to conduct targeted excavations and to better understand the spatial distribution of the identified remains. Thus, the study gives new results on the succession and overlap of the archaeological remains of a medieval castle built on the remnant of a GalloRoman theater.L’étude présente des campagnes de prospections géophysiques et de sondages archéologiques qui se complètent pour répondre à un double objectif : 1- comprendre l’enchaînement de l’occupation anthropique du territoire entre l’époque romaine et l’époque médiévale d’un secteur archéologique inédit à Horbourg-Wihr (Haut-Rhin, France) ; 2- tester l’efficacité de l’utilisation combinée de méthodes de prospections géophysiques et de la fouille archéologique pour identifier et caractériser les vestiges. L’utilisation de différentes méthodes géophysiques complémentaires se révèle particulièrement adaptée au contexte du site et les résultats ont permis d’implanter des sondages ciblés et de mieux comprendre la distribution spatiale des vestiges identifiés lors de la fouille. Ainsi, cette étude apporte de nouvelles informations sur la succession et superposition de vestiges d’un château médiéval sur la base d’un théâtre gallo-romain

An Integrated Approach for Ground and Drone-Borne Magnetic Surveys and their Interpretation in Archaeological Prospection

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Processing of unmanned underwater vehicle vector magnetometer data

International audienceHigh-resolution marine magnetic surveys are increasingly acquired using unmanned underwater vehicles (UUV). Due to its proximity to the sensor, the magnetic noise from the UUV can be as high as tens of nanoteslas (nT). We show that we can correct for these magnetic effects and reduce the noise to a few nT. These corrections require acquiring figures of merit and using a vector magnetometer. We illustrate the benefit of our processing workflow on data from a recent magnetic survey acquired with a micro-UUV

Mapping and Detection of Small-Scale Magnetic Anomalies with Shipborne Vector Magnetometer Measurements. Case Studies in the Coastal Shallow Waters of the Bay of Brest and Iroise Sea (France)

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A Versatile Solution for High-Quality Uav Fluxgate Magnetic Acquisitions

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French-Ethiopian Archaeological Mission in Eastern Tigray (Ethiopia). Report on the 2020 season. The Region of Wolwalo.

The main purpose of this season’s work was to characterise the area of Wolwalo, where a group of archaeological sites had been identified during the two previous seasons (see 2017 and 2018 reports), leading us to consider the possibility of the presence of an antique town in this area. This antique town is marked by several surface concentrations of pottery often associated to visible remains (walls, buildings, graves). The surfacepottery is rather homogenous, but distinct from the one at Wakarida. A first trial trench carried out in 2018 allowed us to obtain a 14C dating of this pottery assemblage between the 7th and the 9th century CE. This period marks the fall of the kingdom of Aksum. Since it remains scarcely documented, it prompted us to investigate the area.Four axes of research were conducted:• The survey of the Wolwalo area was completed in the south-east quarter of the plateau (J. Schiettecatte).• An environmental study of the plateau of Wolwalo was initiated through a geomorphological survey (N. Blond).• A geophysical survey was conducted in the area of Gra Emni, north of Wolwalo (R. Al-Khatib Alkontar & H. Reiller).• Excavations were conducted in the area of Gra Emni (D. Albukaai, M.-B. Dhorne & G. Tavernier).• The pottery material was studied by Anne Benois

French-Ethiopian Archaeological Mission in Eastern Tigray (Ethiopia). Report on the 2020 season. The Region of Wolwalo.

The main purpose of this season’s work was to characterise the area of Wolwalo, where a group of archaeological sites had been identified during the two previous seasons (see 2017 and 2018 reports), leading us to consider the possibility of the presence of an antique town in this area. This antique town is marked by several surface concentrations of pottery often associated to visible remains (walls, buildings, graves). The surfacepottery is rather homogenous, but distinct from the one at Wakarida. A first trial trench carried out in 2018 allowed us to obtain a 14C dating of this pottery assemblage between the 7th and the 9th century CE. This period marks the fall of the kingdom of Aksum. Since it remains scarcely documented, it prompted us to investigate the area.Four axes of research were conducted:• The survey of the Wolwalo area was completed in the south-east quarter of the plateau (J. Schiettecatte).• An environmental study of the plateau of Wolwalo was initiated through a geomorphological survey (N. Blond).• A geophysical survey was conducted in the area of Gra Emni, north of Wolwalo (R. Al-Khatib Alkontar & H. Reiller).• Excavations were conducted in the area of Gra Emni (D. Albukaai, M.-B. Dhorne & G. Tavernier).• The pottery material was studied by Anne Benois