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I was trained in seismic prospecting. We'd drill a deep hole and put dynamite in the bottom and blow it up remotely, which would give you a cross-sectional picture of the subsurface, which tells you where to drill.
I was trained in seismic prospecting. We'd drill a deep hole and put dynamite in the bottom and blow it up remotely, which would give you a cross-sectional picture of the subsurface, which tells you where to drill.