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Figure 142. (A) Drilling Scorpion Mound while looking east. Note cement bag on top of drill string under seated driller, both for added weight. (B) Extruding limestone core from a core barrel. (C) Examining core segments under the microscope. (D) Upon completion, the drill hole was plugged with rags and cement and marked with country (native) rock. TD = total depth.

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Coastal & Marine Geology Program > Center for Coastal & Watershed Studies > Professional Paper 1751