North American Database of Archaeological Geophysics

Image Library (by location): Iowa (IA)

Sorted alphabetically by site name

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

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Daw Farm

Magnetic gradiometer data with contour lines overlain image map;

Conductivity with contour lines overlain image map;

Resistance data with contour lines overlain image map;

Effigy Mounds National Monument (1)

A radar profile across the planar feature of Little Bear Mound (Mound 52);		Measurements of soil voltage using two different types of electrodes;		Corrections to the self-potential measurements acquired with plaster electrodes;
The measurements of induced polarization taken with three different electrode spacings;		The electrical resistivity on line 1, taken with three different electrode spacings;		A resistivity pseudosection of line 1;
Seismic record 245 showing the increasing delay in the arrival of the seismic wave at greater distance;		Reversed seismic record 246;		The dispersion of the seismic wave from recording 250;
A Rayleigh wave pseudosection measured on linear mound 20;

Effigy Mounds National Monument (3)

Magnetic image, Conical Mound 45, Effigy Mounds National Monument, IA;		Resistance image at 0.5 m depth, Conical Mound 45, Effigy Mounds National Monument, IA;		Resistance image at 1 m depth, Conical Mound 45, Effigy Mounds National Monument, IA;
Resistance image at 1.5 m depth, Conical Mound 45, Effigy Mounds National Monument, IA;		Electromagnetic conductivity image, Conical Mound 45, Effigy Mounds National Monument, IA;		Magnetic susceptibility image, Conical Mound 45, Effigy Mounds National Monument, IA;

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