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subsurface geology and coal resources of the pennsylvanian system ...

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ILLINOIS BASIN COAL RESOURCES<br />

34<br />

I<br />

- + A n + + o<br />

RESISTIVITY<br />

a M m so<br />

YLF-POTENTIAL<br />

-*rort o<br />

RESISTIVITY<br />

9 m y<br />

SELF-POTENTUL<br />

HlLLlMLTS OHMS MILLIVOLTS .. OHMS M%<br />

EDWARDS CO.<br />

INDEX MAP<br />

9<br />

,<br />

SELF-POTENTIAL<br />

--.lo-,+ 0<br />

RESISTIVITY<br />

20 40 W 80<br />

MlLLlYDLiZ<br />

OHMS M'/M<br />

FIG. 8.-Graphic<br />

logs <strong>of</strong> control drill holes in <strong>the</strong> nor<strong>the</strong>rn part <strong>of</strong> Edwards County.

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