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13 Cards in this Set
- Front
- Back
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area where evaporation excedes precipitation
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eolian system
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area covered by active dunes greater than 125 square km
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erg
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most distinct feature of eolian systems
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trough cross bedding
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wind picks up anything small leaving large material behind
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desert pavement
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thin veneer of sand
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sheet sands
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represents something that happened at the front of a dune possibly a collapse
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reactivation surface
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represents the migration patterns of dunes on top of each other
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superposition surface
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represents some change in the depositional pattern
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interdune
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regional unconformity
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super surface
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uncommon in the geologic record, lake setting, very disperse
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lacustrine environment
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alternating light and dark sequences representing seasonal changes
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varves
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stream flowing year round
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perenial
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stream not flowing year round
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euphemeral
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