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13 Cards in this Set
- Front
- Back
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Cave system
see Cave |
A natural subterranean void commonly consisting of a series of chambers that are large enough for a person to enter; formed most often in the rock types limestone or marble.
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collapsible soil
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Soils that compact and collapse after they get wet. ... Another term for collapsible soils is "hydrocompactive soils." Also see page 215 of text (definition not in glossary in back of book).
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disappearing stream
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A brook, creek, or river that flows from a surface channel into the ground and continues flowing underground.
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expansive soil
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In-place, weathered earth materials that, upon wetting and drying, will alternately expand and contract, causing damage to foundations of buildings and other structures.
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frost heaving
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The upward and lateral movement of soil particles and the land surface as the result of ice formation in the soil.
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frost-susceptible soil
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Surficial earth material that is likely to move and expand when frozen as the result of the accumulation of ice between particles of the material; commonly unconsolidated material with a high content of silt.
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groundwater mining
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The pumping of sub-surface water at a faster rate than it is being replenished.
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karst topography
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A landscape characterized by sinkholes, caverns, and diversion of surface water to subterranean routes.
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organic soil
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A surficial, in-place accumulation of partially decayed plant material, such as peat.
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permafrost
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Earth material in the ground with a temperature that is below freezing continuusly for at least two years; commonly cemented with ice; underlies about 20 percent of the world's land area.
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sinkhole
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Surface depression formed by the dissolution of underlying sedimentary rock or collapse over a subterranean void such as a cave.
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spring
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Areas where groundwater naturally discharges at the land surface.
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subsidence
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Sinking, settling, or other lowering of parts of the crust of Earth.
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