North American Database of Archaeological Geophysics
North American Database of Archaeological Geophysics
Graphic/Image:
Project Name: Falling Creek Ironworks (44CF7), VA;
Reference: http://www.archaeophysics.com/falling/index.html (used with permission).
Magnetic survey results clipped at +- 0.5 standard deviations to display subtle anomalies. The anomalies outlined in yellow and red are likely caused by a slag and charcoal deposit identified during previous investigations. The anomaly centered at 13N, 43E is a modern drainage culvert that runs underneath the access road. The anomalies outlined in light blue are strong candidates for smaller buried in-situ thermo-remanent archaeological features such as bloomeries, chaferies, kilns etc. The linear magnetic field gradient highs outlined in dark blue may be linear archaeological features such as walls, trenches, etc. Numerous high-amplitude, short wavelength bipolar anomalies are outlined in orange. These anomalies are aligned to magnetic north and have strong positive and negative components (+-50 to 100 nT). The high amplitude and short wavelength of these anomalies indicate they are probably caused by ferrous iron objects at or close to the ground surface, however their north-south orientation suggests that they might be caused by in-situ thermo-remanent archaeological features.