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A spring which is formed when the downward passage of ground water in a permeable deposit is hindered by an underlying impervious layer.

A spring which is formed when the downward passage of ground water in a permeable deposit is hindered by an underlying impervious layer. Correct Answer Stratum spring

Concept:

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A stratum spring is formed when the downward passage of groundwater in a permeable deposit is hindered by an underlying impervious layer.

Artesian Springs: When a water-bearing bed is confined between relatively impervious strata and water is introduced from a higher elevation, the confined water is said to be under artesian pressure. Artesian springs occur where these confined permeable strata are exposed near the surface

A depression spring is formed when the land surface intercepts the water table in permeable material.

A contact spring is formed when downward movement of water is restricted and deflected laterally to the land surface by a layer of impervious material; for example, the outcrop of a perched water table forms a contact spring.

Fracture or tabular springs are formed when water emerges from fractures or joints in rock, from solution channels in limestone or gypsum, or from natural tunnels in volcanic rock.

Karst springs - Limestone host many springs. Springs in limestone terrains can be interconnected to topographic depressions caused by sinkholes – depressions in the ground surface cause due to the dissolving of limestone below. Large quantities of water move through the cavities, channels, conduits and other openings developed in limestone.

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