Question: What Properties Of The Rock/sediment Make For An Aquifer That Produces A Steady Supply Of Water?

Which rock type would make the best aquifer?

An aquifer is a body of saturated rock through which water can easily move. Aquifers must be both permeable and porous and include such rock types as sandstone, conglomerate, fractured limestone and unconsolidated sand and gravel. Fractured volcanic rocks such as columnar basalts also make good aquifers.

Which of the following materials would make the best aquifer?

Water from an aquifer is generally extremely clean, as the fine sediments trap particles and bacteria, acting as a natural filter. The sediments that tend to make the best aquifers include sandstone, limestone, gravel and, in some cases, fractured volcanic rock.

How are aquifers formed?

When a water-bearing rock readily transmits water to wells and springs, it is called an aquifer. Wells can be drilled into the aquifers and water can be pumped out. Precipitation eventually adds water (recharge) into the porous rock of the aquifer.

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Which of the following would make a good Aquitard?

In general, gravel, sandy materials, limestone, or highly fractured rocks make good aquifers, whereas clay-rich, poorly sorted sediments, and unfractured rocks often form aquitards. The term aquiclude has been used for describing an impermeable unit, but this term has become obsolete.

What kind of rock can water not pass through?

Clay and granite are impermeable, meaning that water cannot pass through. When water reaches the impermeable materials it is trapped and forms the water table – where we get our water.

Which rock layer that can be porous but must have very low to no permeability?

A good example of an aquitard is a layer of clay. Clay often has high porosity but almost no permeability meaning it is essentially a barrier which water cannot flow through and the water within it is trapped.

Which of the following would make the best aquifer quizlet?

Good aquifers include sandstone, conglomerate, well-jointed limestone, bodies of sand and gravel, and some fragmental or fractured volcanic rocks such as columnar basalt.

Is mudstone a good aquifer?

Both sand and clay deposits (and sandstone and mudstone) are quite porous (30% to 50% for sand and 40% to 70% for silt and clay), but while sand can be quite permeable, clay and mudstone are not. Unconsolidated materials like gravel, sand, and even silt make relatively good aquifers, as do rocks like sandstone.

Why is Clay’s permeability low?

Clay textured soils have small pore spaces that cause water to drain slowly through the soil. Clay soils are known to have low permeability, which results in low infiltration rates and poor drainage. As more water fills the pore space, the air is pushed out.

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What are three types of aquifers?

Aquifers are categorized as confined or unconfined, but there are many types of aquifers that are classified by where they are located in the earth and the material of which they are comprised. There are three types of aquifers: unconsolidated deposit aquifers, bedrock aquifers and quaternary aquifers.

Where do aquifers get their water from?

An aquifer is a body of porous rock or sediment saturated with groundwater. Groundwater enters an aquifer as precipitation seeps through the soil. It can move through the aquifer and resurface through springs and wells.

Can aquifers be man made?

Confined aquifers that are under pressure are known as artesian aquifers. This pressure can push water to the surface, which when drilled are called artesian wells. Adding to those challenges, California uses more groundwater — the main water source for aquifers — than can be replaced naturally or artificially.

What is meant by Aquifuge?

Definition of Aquitard: An aquifuge is an absolutely impermeable unit that will not transmit any water. An aquiclude is a formation that has very low hydraulic conductivity and hardly transmits water.

What rocks make good aquitard?

Sands, sandstones, gravels, and conglomerates are good examples of aquifers. 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.

What earth material would be considered an aquitard?

In general, gravel, sandy materials, limestone, or highly fractured rocks make good aquifers, whereas clay-rich, poorly sorted sediments, and unfractured rocks often form aquitards. The term aquiclude has been used for describing an impermeable unit, but this term has become obsolete.

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