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21 Cards in this Set
- Front
- Back
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eolian
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caused by wind; refers to the erosion, transportation, and deposition of materials
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deflation
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process of wind erosion that removes and lifts individual particles, literally blowing away unconsolidated, dry or noncohesive sediments
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abrasion
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mechanical wearing and erosion of bedrock accomplished by the rolling and grinding of particles and rocks carried ina stream moved by wind in a "sandblasting" action, or imbedded in glacial ice
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desert pavement
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in arid landscapes, a surface formed when wind deflation and sheet flow remove smaller particles, leaving residual pebbles and gravels to concentrate at the surface; resembles a cobblestone street
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blowout depressions
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Eolian erosion whereby deflation forms a basin in areas of loose sediment.
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ventifacts
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the individual pieces and pebbles etched and smoothed by eolian erosion--abrasion by windblown particles
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yardangs
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deflation and abrasion are capable of of streamlining rock structures, leaving distinctive rock formations or elongated ridges called...
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surface creep
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a form of eolian transport that involves particles too large for saltation; a process whereby individual grains are impacted by moving grains and slide and roll
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dunes
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a depostional feature of sand grains deposited in transient mounds, ridges and hills; extensive areas of sand dunes are called sand seas
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erg desert
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sandy deserts, or areas where sand is so extensive that it constitutes a sand sea
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sand sea
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an extensive area sand and dunes; characteristic of Earth's erg deserts
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loess
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large quantities of find grained clays and silts left as glacial deposits.
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flash flood
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a sudden short lived torrent of water that exceeds the capacity of a stream channel; associated with desert and semiarid washes
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wash
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an intermittently dry streambed that fills with torrents of water after rare precipitation events in arid lands
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playa
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an area of salt crust left behind by evaporation on a desrt floor, usually in the middle of a bolson or valley; intermittently wet and dry
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alluvial fan
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fan shaped fluvial landform at the mouth of a canyon, generally occurs in arid landscapes where streams are intermittent
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bajada
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a continuous apron of coalesced alluvial fans, formed along the base of mountains in arid climates; presents a gently rolling surface from fan to fan
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badland
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rugged topography, usually relatively low, varied relief and barren of vegetation; associated with arid and semiarid regions and rocks with low resistence to weathering
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basin and range province
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a region of dry climates, few permanent streams, and interior drainage patterns in the western US; composed of a sequence of horsts and grabens
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bolson
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the slope and basin area of between the crests of two adjacent ridges in a dry region
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desertification
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expansion of deserts worldwide, related principally to poor agricultural practices, improper soil moisture management, erosion and salinization, deforestation, and the ongoing climatic change; an unwanted semi-permanent invasion into neighboring biodomes
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