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What does an aquifuge lack?

Porosity only

Permeability only

Both porosity and permeability

An aquifuge is a geological formation that does not allow water to flow through it. This characteristic stems from the absence of both porosity and permeability.

Porosity refers to the volume of voids or spaces in a material, which can hold water. Without porosity, there are simply no spaces to contain water. Permeability, on the other hand, measures the ability of a material to allow fluids to pass through it. If a material lacks permeability, it means that even if water were present, it could not move through the material due to its solid characteristics.

In summary, an aquifuge lacks both the necessary voids to hold water (porosity) and the capacity to transmit it (permeability), establishing its role as an impermeable barrier in the groundwater system. Each answer choice addresses a different aspect of this characteristic, but the defining trait of an aquifuge is the complete absence of both properties.

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