North American Database of Archaeological Geophysics
North American Database of Archaeological Geophysics
Abstract/Summary:
Project Name: 30-30 Winchester Site (48CA3030), WY;
Reference: http://www.archaeophysics.com/3030/index.html (used with permission).
Archaeo-Physics LLC was
contracted by GCM Services, Inc. to perform a magnetic field gradient survey
as part of archaeological investigations at the 30-30 Winchester Site (48CA3030),
a prehistoric site in Campbell County, Wyoming. The magnetic field gradient
survey was successful in detecting several anomalies that were thought to be
caused by prehistoric hearths (later verified by excavation). In general, the
site had very little magnetic "clutter" due to modern metal or geologic
variance. The standard deviation of magnetic data after processing was 0.4nT.
Anomalies thought to be caused by hearths have amplitudes up to several nanoTeslas
and contrast starkly with the very uniform background.