North American Database of Archaeological Geophysics

Image Library (by location): Illinois (IL)

Sorted alphabetically by site name

Conductivity GPR Induced Polarization Magnetic Magnetic susceptibility Metal detector Multiple Methods Seismic Refraction Self Potential Resistance/Resistivity

(to view an enlargement of a graphic, click on it)

 

Cahokia Mounds State Historic Site (1)

The average resistivity at each sounding;   An analysis of the resistivity soundings;   A plot of the resistivity pseudosection;
Conductivity measurements on lines 1 and 2;   Conductivity measurements on lines 3 and 4;   Azimuthal seismic refraction measurements at location 1;

Cahokia Mounds State Historic Site (2)

EM31 transects across a well-defined mound;   EM conductivity map of the Grand Plaza prepared using Surfer (version 3.0);    

Cahokia Mounds State Historic Site (3)

Surfer contour map of magnetic data.   Surfer contour map of resistivity data.   GEOPLOT shade relief plot of resistance data.

Cahokia Mounds State Historic Site (4)

Geometrics G-858 cesium gradiometer contour and image data plots   Geoscan Research FM36 fluxgate gradiometer contour and image data plots;   Geoscan Research RM15 resistance meter and MPX15 multiplexer contour and image resistivity data plots at .5 m, 1.0 m, and 1.5 m probe separation;
Geohm 40D resistivity data and model for vertical electrical sounding in Northeast Palisade Project Area;   Geonics EM38 conductivity meter contour and image data plots;    

Fort de Chartres

A conductivity map of an area on the NW side of Fort de Chartres;        

Grossmann Site

Image showing magnetic anomalies;   Magnetic image with interpretations. About 60% of the structures and 40% of other features were detected;    

Orendorf Site

Resistivity map based on 3-feet (0.9 meter) electrode spacing;   Elongate fabric patterns picked from the contoured electrical resistivity map and fabric orientation diagrams;    

Pfeffer Site

Image showing magnetic anomalies;   Magnetic image with interpretations. Red rectangles are structures, yellow circles are pits, and white lines indicate limit of mechanized stripping of plow zone.    

 

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