North American Database of Archaeological Geophysics
North American Database of Archaeological Geophysics
Graphic/Image:
Project Name: Fort Phil Kearny Historic Site, WY;
Reference: http://www.archaeophysics.com/kearny/index.html (used with permission).
Magnetic field gradient data with minimal processing (zero mean traverse, interpolation of data points, data clipped to +/-30nT). Strong bipolar (having both a positive and negative component) fields which approach or exceed the limits of displayed data are presumed to be associated with substantial brick, iron, or steel objects. More subtle variation may be associated with nails or other small metal objects, or disturbed, burned or organically enriched soils.