ice lens sentence in Hindi
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- Ice lenses play the key role in complex patterns.
- Ice lenses play the key role in fracture of bedrock and complex patterns.
- Often, these situations lead to the formation of what are known as ice lenses.
- Ice lenses will form within the bedrock, accumulating until the rock is sufficiently weakened that it shears or spalls off.
- The permafrost core contains ice lenses no thicker than 2 3 cm, though locally lenses up to almost 40 cm thick have been described.
- However the majority of frost heaving and of bedrock fracture results instead from ice segregation in ice lenses in the near-surface frozen regions.
- Ice lens growth within the bedrock below the glacier is projected during the summer months when there is ample water at the base of the glacier.
- They are found in shallow hollows in arable fields, which are the result of ice lenses melting at the end of the last ice age.
- Certain frost-susceptible soils expand or heave upon freezing as a result of water migrating via capillary action to grow ice lenses near the freezing front.
- Bands of sediment or glacial till have been observed below Antarctic ice sheets; these are believed to result from ice lenses forming in the debris and in the bedrock.
- As ice lenses grow, they lift the soil above, and segregate soil particles below, while drawing water to the freezing face of the ice lens via capillary action.
- As ice lenses grow, they lift the soil above, and segregate soil particles below, while drawing water to the freezing face of the ice lens via capillary action.
- As a result, when conditions exist for ice segregation ( ice lens formation ) water flows toward the segregated ice and freezes on the surface, thickening the segregated ice layer.
- The particle migrates downwards toward the warmer soil in a process that Faraday called " thermal regelation . " This effect purifies the ice lenses as they form by repelling fine soil particles.
- Glacially-induced spalling occurs when ice lens formation with the rocks below the glacier spall off layers of rock, providing smaller debris which is ground into the glacial basal material to become till.
- A key phenomenon for understanding ice segregation in soil or porous rock ( also referred to as an ice lens due to its shape ) is premelting, which is the development of a liquid film on surfaces and interfaces at temperatures significantly below their bulk melting temperature.
- Research suggests that the main cause is actually'frost-shrinkage'due to the freezing-out of cell well moisture into lumens of wood cells and other causes are the expansion of freezing water in cell lumens, and additionally the formation of ice lenses within wood.
- As this process occurs, the upper soil material gradually dries out ( because the soil moisture moves from the warm surface layer to the colder layer at the top of the permafrost ) so that it forms a granular structure with many very distinctive crystalline shapes ( such as ice lenses ).
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