Interpretation
A 800 m cover of 30 ohm-m over 500 ohm-m basement turns the sounding curve at about 2755 m; natural-field energy at 1 Hz senses roughly 4830 m.
Apparent resistivity @ marker
92.2 ohm-m
Phase @ marker
157.8 deg
Bostick depth @ marker
4,830 m
Max depth (1000 s)
355,675 m
Contrast
16.67x
Apparent resistivity sounding
The curve leaves the cover resistivity and asymptotes to the basement value.
Impedance phase
Phase above 45 degrees means resistivity is increasing with depth, below means decreasing.