impermeable rock

However, limited water would be available because the layer of impermeable rock also lies near the ground surface.

Clean water is abundant due to the mountainous terrain with its impermeable rock.

Impermeable rock can form a barrier or seal preventing the escape of petroleum.

Impermeable rock is rock which lets water filter through.

A ground watertable which sits above (perched on top of) an impermeable rock or soil structure.

Water cannot easily flow in these impermeable rocks.

Underground waste, officials say, is contained by layer after layer of impermeable rock.

Many creeks rise in the central part of the hills, composed of impermeable rock.

However, by far most of geothermal energy within reach of conventional techniques is in dry and impermeable rock.

Rock masses contain a fluid phase, except in areas where high temperatures or impermeable rocks prevail.

Petroleum is typically found in porous stone, trapped under pressure beneath layers of harder, impermeable rock.

With its steep sides, flat impermeable rock floor and narrow bottle-neck shape, it was an ideal site for a reservoir.

An artesian aquifer is confined between impermeable rocks or clay which causes this positive pressure.

Overlain by an impermeable rock strata which will prevent vertical movement of the fluid from the storage zone.

This is because the plateau is endorheic, and there is impermeable rock just below the surface of the ground.

Based on radiometric dating, impermeable rocks were affected weakly by postmetamorphic hydrothermal events.

Pinching out-a layer of impermeable rock is squeezed upward into the reservoir rock.

To begin with, the vertical depth separation between drinking water aquifers and reservoir targets for gas production is several thousand feet of impermeable rock.

In the first type ground water is stored in and flows through fissures or fractures in the essentially impermeable rock.

The pools - pockets of water that form atop impermeable rock after rain showers - also serve as temporary habitat to countless migratory birds.

It was found that the area is underlain by impermeable rock strata, and that leakages through the basement could be safely ignored.

Because of the transition from water-permeable to impermeable rock layers several spring horizons have emerged, explaining the richness of the springs.

Fracking takes place thousands of feet below the water table, and fracking zones are typically separated from groundwater by fairly impermeable rocks.

The field has remained undeveloped because the oil is trapped in impermeable rock, requiring advanced technology and very large numbers of oil wells to extract it.

The permeable reservoir rock faults such that it is now adjacent to an impermeable rock, preventing hydrocarbons from further migration.