Shale is a common _____ because it retards the flow of ground water.

Name: Shale is a common _____ because it retards the flow of ground water.
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Question

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Shale is a type of sedimentary rock that has low permeability, which makes it a good aquitard. An aquitard is a layer of rock or sediment that restricts the flow of groundwater between aquifers. Therefore, shale can hinder the flow of groundwater and act as a barrier between two aquifers.

Shale Is a Common _____ Because It Retards the Flow