Examlex
Which of the following sampling procedures is useful for certain types of forecasting, and ensures that the sample is guaranteed to meet a specific objective?
Volcanic Conduit
A pipe-like structure through which magma moves from a magma chamber to the Earth's surface.
Diamond Pipe
A steep, cylindrical- to funnel-shaped volcanic conduit that contains diamonds dispersed in an igneous rock; synonym kimberlite pipe.
Copper Veins
Concentrated occurrences of copper minerals found within rock formations, often extracted through mining.
Impermeable Unit
A geological formation that does not allow fluids to pass through it due to its material composition or structure.
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