From the geologic-ground-geophysics profiles we developed the geophysical signature tables shown above.
Note how these forced us to subdivide the Cannery (PMc) unit into two different units, PMc1 and PMc2.
Note also the resemblance in geophysical signatures between PMc2 and Trha. This is causing us to reconsider the assignment of these map units.
From careful selection of known geology we set up a number of ground geophysics profiles to adequately sample the main geologic units in the Duncan-Zarembo area that we were interested in. When we analyzed the results we got these tables of geology-vs-resistivity, geology-vs-magnetic susceptibility, and geology vs-magnetic variability, a rough classification of magnetic wavelength observed in the given geologic unit. These three taken together allow us to discriminate the key geologic units in the Duncan-Zarembo area, and even force us to reconsider the Cannery (PMc) unit as possibly two separate geologic units (note the similarity of PMc2 with the Trha unit). In this latter case, the difference may be due to a different depositional environment or may be due to a different degree of metamorphism in two different areas.
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