North American Database of Archaeological Geophysics

Image Library (by archaeological site type): Historic/Non-Native Structure

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

Project images sorted alphabetically by state or country; within each by site name and geophysical survey type

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

ARKANSAS

Mount Comfort Church

The basic shape of the structure can be seen in the magnetic data, probably due to the higher magnetic susceptibility of remnant bricks;		Electrical resistivity survey area revealing the foundation of the historic church in the upper right area as well as a number of roads, tracks, and other features;		A detailed examination of the church area shows its outline and interior support piers, all probably of more resistant brick;
Thirty GPR profiles, each 0.5 m apart, were subjected to time slicing to produce plan graphics;		Close inspection reveals clear evidence of the church foundation in the 8-16 nS time slice, with evidence of perhaps a walkway seen in the 0-8 nS time slice;

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COLORADO

5LA3421

Magnetic susceptibility for profile of TU3 in the prehistoric midden;

Conductivity data overlain on elevation map;

Bent Canyon Stage Stop (5LA3179)

Resistivity survey results at the Bent Canyon Stage Stop;

Twelve Mile House (5AH121)

Gradient field plot for magnetometer;		Out-of-phase (conductivity) component plot for EM-31;		GPR profile of undisturbed area along Line 3;
Anomalous GPR profile along Line 6;

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GEORGIA

Mission Santa Catalina de Guale

Magnetic contour map of Quad IV, Santa Catalina de Guale;		Three-dimensional magnetic map of Quad IV, Santa Catalina de Guale;		Three-dimensional magnetic map of nine quadrangles at Santa Catalina de Guale;
SYMAP rendering of magnetic profile of Quad IV, Santa Catalina de Guale;

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IOWA

Plum Grove Historic House Site

Magnetic gradient data at Plum Grove Historic House;

Conductivity data at Plum Grove Historic House;

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KANSAS

3D Ranch

Electrical resistance view of a probable 1860s barn foundation at the 3D Ranch site, near El Dorado, KS;

Cavalry Stable Area, HS-35 (Fort Larned National Historic Site)

Magnetic gradient data from Fort Larned;

Conductivity data from Fort Larned;

Fort Scott National Historic Site (1)

Contoured magnetic gradiometer data from Grid 1;		Shade plot of the magnetic gradiometer data from Grid 1;		Contour map of the resistivity data from Grid 1;
Contour map of the resistivity data from Grid 2;		Contour map of the resistivity data from Grid 3;

Fort Scott National Historic Site (2)

The seismic measurements at Fort Scott;

Fort Scott National Historic Site (3)

Results of depth response experiments with the Bartington Susceptibility Meter and Field Coil;

Measurements of volume magnetic susceptibility with the Bartington Susceptibility Meter and Field Coil;

Interpretation of resistivity sounding data;

Sluss Cabin

Resistance image and profile, Sluss Cabin, KS;

Three-dimensional surface plot, resistance data, Sluss Cabin, KS;

Resistance data interpretations, Sluss Cabin, KS;

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MICHIGAN

Ayslum Lake Property

Resistiviy Data

Fort Wilkins State Park

Guard house magnetic gradient data;		Carpenter shop and blacksmith magnetic gradient data;		Guard house resistivity data;
Carpenter shop and blacksmith resistivity data;

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MINNESOTA

Waraju Distillery

Gray scale (colorized) and line trace representations of the resistance data from Waraju distillery;

Colored and contoured representation of the resistance data from Waraju distillery;

Wuamett Farmstead

Magnetic gradiometry image showing overall anomalies in vicinity of farmyard, Wuamett Farmstead, MN;		Magnetic gradiometry image showing principal large anomalies in farmyard, Wuamett Farmstead, MN;		Electrical resistance image showing overall anomalies in vicinity of farmyard, Wuamett Farmstead, MN;
Electrical resistance detail showing possible, and one certain, privy feature, Wuamett Farmstead, MN;		Electrical resistance details showing anomalies indicating possible farmyard outbuildings, Wuamett Farmstead, MN;KS;

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

NEBRASKA

Fort Robinson State Park

East-west electrical resistivity survey map with Barracks 56 archeological test units superimposed;

North-south electrical resistivity survey map with Barracks 56 archeological test units superimposed;

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NEW MEXICO

San Marcos Pueblo Historic Mission (LA98)

Combined resistivity and magnetic field gradient data collected over the site of the historic mission at Pueblo San Marcos;

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NORTH DAKOTA

Jacob Dobmeier Brewery

Results of the resistivity survey at Central Park, Grand Forks, ND;

Interpretations overalaid on the results of the resistivity survey at Central Park, Grand Forks, ND;

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

OREGON

Corvallis Historic Water Front Site

Shaded relief plot of the magnetic survey results;

Interpretive map of the magnetic survey results;

Fort Clatsop National Memorial

Fort Clatsop magnetic survey, all seasons, clipped at +/- 500 nT;		Fort Clatsop magnetic survey, all seasons, clipped at +/- 130 nT;		Fort Clatsop magnetic map showing the possible Smith house area;
1997 Fort Clatsop magnetic map showing the locations of previously excavated trenches;

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VIRGINIA

Booker T. Washington's Birthplace Cabin (Booker T. Washington National Monument)

Resistivity data from Booker T. Washington's birthplace cabin with distinct anomalies A-E;

Falling Creek Ironworks (44CF7)

Magnetic survey results clipped at +- 3 standard deviations to emphasize extremely high amplitude large-scale anomalies;		Magnetic survey results clipped at +- 0.5 standard deviations to display subtle anomalies;		Results of the resistivity survey;
A representative GPR transect displayed as a two-dimensional plot;

Historic Slave Quarters Core Area (Booker T. Washington National Monument)

Magnetic gradiometer data from the Historic Slave Quarters Core Area;

Resistivity data from the Historic Slave Quarters Core Area;

St. George Tucker House

Electrical resistance at the Tucker House Garden;		Ground penetrating radar profile along line N1357;		Ground penetrating radar profile along line E771;
Magnetic survey at the location of a stone circle which might have marked a small goldfish pond;		Magnetic map of a small area at the Tucker House;

Taylor House (Petersburg National Battlefield)

A GPR profile of the Taylor House cellar with a low frequency (120 MHz) antenna;		A GPR profile of the Taylor House cellar with a high frequency (315 MHz) antenna;		A GPR profile of the length of the Taylor House cellar made with a medium resoulution, 180 MHz antenna;
A magnetic contour map of the Taylor House (5 and 10 nT contours);		A fast, low resolution magnetic survey of the Taylor House (5 and 10 nT contours);		A magnetic contour map of the Taylor House measured with a magnetic gradiometer (10 nT contours);
An average of two EM31 surveys;		A surface map of EM31 conductivity;		A smoothed EM38 conductivity map of the Taylor House;
A surface map of the EM38 conductivity;		A smoothed contour map of magnetic susceptibility at the Taylor House;		The electrical resistivity of the soil at the Taylor House;
A smoothed resistivity map of the Taylor House;		A plot of the resistivity sounding at the Taylor House;		Calculated resistivity soundings for two layers;
A self-potential survey across the cellar of the Taylor House;

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

CANADA

New Brunswick

Fort Jemseg Geophysical Survey

Magnetic Gradiometer data revealing historic house foundation;

Newfoundland

Basque Whaling Station (Red Bay National Historic Site)

Short sections of radar data on line S293.5 indicating two shallowly buried targets and a surface rock;

Quebec

Parc Laurier

Radar data from line 190 E between 90 N and 30 N;

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