The Archeo-Imaging Lab employs geophysical survey techniques and innovative GIS, remote sensing, computer graphic, and statistical methods to display, map and interpret subsurface archeological features.

Geoscan Research	FM-36 Magnetic Fluxgate Gradiometer
The FM-36 yields up to eight measurements per second at 0.1 nT resolution and is capable of storing 16,000 measurements for later downloading and processing.

Geoscan Research	RM-15 Electrical Resistance Meter & MPX-15 Multiplexer
The RM-15 can focus prospecting depth between .25-2.0 m. It is capable of storing 30,000 measurements at better than .01 ohms resolution for later downloading and processing. The MPX-15 multiplexer allows resistance measurements to be acquired at multiple depths at a single station using up to six probes.

Geonics Ltd.	EM38B Electromagnetic Induction Meter
The EM38B simultaneously measures quadrature phase (conductivity) and in-phase (magnetic susceptibility) components. The former is sensitive to a depth of approximately 1.5 m, and the later to about 50 cm in the vertical dipole mode. It can record up to 2 measurements per second on a non-integrated portable field computer, a Juniper Systems, Inc., Allegro Field PC.

Geophysical Survey Systems, Inc.

SIR 2000 Ground Penetrating Radar, 400 & 900 MHz Antennas

The SIR 2000 allows viewing of subsurface data in real time on a color computer screen. Up to 64 traces can be recorded per second, each digitized in up to 16 bits and 2048 samples, through ranges up to 120 nS using 400 or 900 MHz antennas. These antenna allow depth penetration from 1-4 m (depending on soil conditions and frequency) with good spatial resolution. Information is stored on a 1 GB hard disk.

Geometrics

G-856A Proton Magnetometer

The G-856A is a total field portable proton precession magnetometer with 0.1 nT resolution. Powered by 8 D-cells, it is a 1980s instrument that acquires excellent data, albeit very slowly, and is well-suited for student training. It is particularly easy to use with its associated data logger, capable of storing 5,700 field readings. For total field data collection two are required, one for a roving unit and the other for a base station to record background diurnal variations. The Lab possesses two instruments, thanks to a generous donation by Cultural Resource Analysts, Inc., of Lexington, Kentucky.

Fisher Research Laboratory	M-Scope 1225-X
The Fisher M-Scope allows locating of metallic objects to typical depths of 10-50 cm.

Ushikata Manufacturing Company, Ltd.	Tracon Surveying Compass, LS-25
This portable, light-weight mini-transit aids in the set-up of survey grids in small areas and the recording of surface elevation data, used for terrain corrections in GPR and surface modeling.

Geophysical instruments are expensive, and the Archeo-Imaging Lab has a big wish list:

Item	Manufacturer	Approximate Cost
G-858 portable cesium magnetometer	Geometrics	$25,000
FM-256 magnetic gradiometer	Geoscan	$25,000
EDM mapping system	various	$15,000
Geophysical data processing software	Geoscan	$2,000
Portable field computer	various	$2,000
GPR simulation software	GSSI	$5,000

Click here if you would like to contruibute toward new purchases.

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Archeo-Imaging Lab
Attn: Professor Kenneth L. Kvamme
Department of Anthropology, Main 330
University of Arkansas
Fayetteville, AR 72701 U.S.A.
(479)575-4130
kkvamme@uark.edu