EARTH SCIENCE
GROUNDWATER
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Conglomerate
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sandstone
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shale
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None of the above
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Detailed explanation-1: -An aquitard is a body of material with very low permeability. In general, tightly packed clays, well cemented sandstones, and igneous and metamorphic rocks lacking fractures are good aquitards.
Detailed explanation-2: -A sediment or rock in which rock tends to move slowly is an aquitard. Shales, clay, and many crystalline rocks are good examples of aquitards.
Detailed explanation-3: -Unconsolidated materials like gravel, sand, and even silt make relatively good aquifers, as do rocks like sandstone. Other rocks can be good aquifers if they are well fractured.
Detailed explanation-4: -An aquitard is a zone within the Earth that restricts the flow of groundwater from one aquifer to another. An aquitard can sometimes, if completely impermeable, be called an aquiclude or aquifuge. Aquitards are composed of layers of either clay or non-porous rock with low hydraulic conductivity.