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Known Target
Anomalies- FM 36 Geophysical survey
|
Historic |
Prehistoric |
Other |
Probability
of Detection |
|
Gravel Paths |
|
|
Low |
|
Brick Foundation |
|
|
High |
|
Scattered Brick |
|
|
Medium-High |
|
Ferrous Metals (e.g., nails) |
|
|
Medium-High |
|
Limestone (negative signature) |
|
|
Low-Medium |
|
Historic Posts |
|
|
Low-Medium |
| Cellars | High | ||
|
Wells |
|
|
High |
|
Cisterns |
|
|
High |
|
Privies |
|
|
High |
|
Prepared Garden Beds |
|
|
No-Low |
|
-With Hist. Debris |
|
|
Low-Medium |
|
Soil Paths |
|
|
No-Low |
|
|
|
|
|
|
|
Prehistoric House Pits |
|
High |
|
|
Prehistoric Pit |
|
Medium-High |
|
|
Prehistoric Hearth |
|
High |
|
|
Prehistoric Posts |
|
Low |
|
|
Prehistoric Midden |
|
Low |
| Prehistoric Artifacts | no (FCR in concentration-Low to Medium) | ||
| Mounds | Low-Medium | ||
|
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| In-filled ditches | Medium-High | ||
|
|
|
Tree Root Casts |
Low-Medium |
|
|
|
Plow Scars |
Medium-High |
|
|
|
Rodent Burrows |
No-Low-Medium |
|
|
|
Burned Trees |
High |
|
|
|
Tractor Parts |
High |