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Fig. 7--Gamma-ray log cross-section of south-central Michigan across Trenton platform showing high gamma-ray deflections used to subdivide Trenton-Black river carbonates (Lilienthal, 1978).
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Fig. 7--Gamma-ray log cross-section of south-central Michigan across Trenton platform showing high gamma-ray deflections used to subdivide Trenton-Black river carbonates (Lilienthal, 1978).