Hradiště u Mařína (okr. Svitavy) a jeho širší zázemí ve světle kovových artefaktů z 6.–10. století / Hillfort near Mařín (East Bohemia) and its broad hinterland in light of metal artefacts from the 6th to 10th century AD

The article evaluates the results of systematic metal detector surveys from the borderland between east Bohemia and northwest Moravia over the past fifteen years, supplemented with a geophysical survey of early medieval hillfort near Mařín (Svitavy district). The conducted surveys have produced imports of Byzantine and Carolingian origin (strap ends, loops, spear tip) from the 7th to 9th century, with cast ornaments of the Late Avar type from the 8th century occurring in the greatest numbers. The spatial distribution of early medieval artefacts outside the traditional settlement territory shows ties to defunct roads preserved in the form of sunken lanes.

Locating places for repatriated burial: A case study from Ngarrindjeri ruwe, South Australia

In this ingenious co-operative case study, archaeologists and Indigenous peoples use geophysical survey to scan suitable places for the reburial of repatriated human remains. The process is also building a procedure for the low impact and respectful research of early Indigenous burial locations.

Geophysical investigations at the Anuru Bay trepang site: A new approach to locating Macassan archaeological sites in Northern Australia

This paper presents the results of a magnetometer survey and initial archaeological excavations of Macassan and Indigenous features conducted at the Anuru Bay Macassan trepang processing site. The archaeology of this area is complex, containing both material reflecting the Indigenous utilisation of coastal resources and the periodic visits of the Macassan trepangers from Indonesia. Despite a history of archaeological investigations on Macassan period sites (i.e. Clarke 1994; McKnight 1976; Mitchell 1994), geophysical survey has not previously been applied as part of these investigations. While Macassan sites may contain features amenable to conventional archaeological geophysics (such as iron trepang processing pots), additional potential exists for the application of magnetometry to locate features created through burning, as has been applied to Australian Indigenous sites (Bonhomme & Stanley 1985; Fanning et al. 2009; Moffat et al. 2008 & 2010; Stanley & Green 1976; Wallis et al. 2008) and international Indigenous sites (Abbot & Frederick 1990; Batt & Dockrill 1998; Jones & Munson 2005). The results of this study demonstrate that this approach is equally applicable to Macassan sites, opening up a new and potentially fruitful avenue for exploring the archaeology of this trade system.

GEO-ELECTRIC INVESTIGATION OF GROUNDWATER POTENTIAL IN LADERIN HOUSING ESTATE, ABEOKUTA, SOUTHWESTERN, NIGERIA

Vertical Electrical Sounding (VES) and 2D Electrical Resistivity Tomography (ERT), with Schlumberger and Wenner electrode array configurations respectively were employed to investigate the groundwater potential of Laderin Housing Estate located at Oke-mosan, Abeokuta, Ogun state, southwestern Nigeria. The area is underlain by the basement complex of the southwestern Nigeria. The research aimed at determining the aquifer/groundwater zone and characterizes the lithology of the study area. The geophysical survey involving nine VES and four profile of 2-D ERT lines with lengths varying from 100 m to 150 m were carried out. The field data from both the ERT and VES were processed and interpreted using RES2DINV and WINRESIST software respectively. Geometrical effects from the pseudo-section were removed and an image of true depth and true formation resistivity were produced. Three to four geo-electric layers were revealed in all, which are; topsoil, weathered layer, fractured and fresh basement rock. The result of 2 D inversion provide lithologic unit, weathering profile and geological structure favourable for groundwater potential. The results show that the basement rock was delineated with resistivity values that range between 701.3 Ωm and 9459.3 Ωm. The bedrock topography has a variable thickness of overburden between 3 m and above 16.4 m, which is fairly shallow. The geophysical survey show that VES 2, VES 3, VES 4, VES 5, and VES 6 are possible location for groundwater extraction. The difficult terrain, where thick overburden are located are also promising target for groundwater development.

Geological and tectonic preconditions for hydraulic heterogeneity of the rocks in the area of the Gotse Delchev valley

Hydrogeological conditions largely depend on the permeability of the geological environment. In areas with complex geological and tectonic conditions, the detection of hydraulic heterogeneity of the rocks and determination of groundwater-rich zones is a challenge for hydrogeological practice. The aim of the study is to analyze the geological and tectonic prerequisites for hydraulic heterogeneity of the sediments for the Gotse Delchev valley (Southwestern Bulgaria), which predetermine the degree of their water productivity. In order to obtain more precise data for specific sites, a geophysical survey was conducted. The Self-Potential method was chosen, which is one of the most commonly used techniques for applications for hydrogeological purposes. The results of the geophysical survey carried out in selected sites allowed to locate groundwater-rich zones, to establish the depth of occurrence of hard low permeable rocks, as well as to confirm the presence of faults.