parna dune

parna dune
   A dune largely composed of silt and sand-sized aggregates of clay; sometimes called a clay dune or lunette.
   Compare: parna.

Glossary of landform and geologic terms. 2013.

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  • dune —    A low mound, ridge, bank or hill of loose, windblown, subaerially deposited granular material (generally sand), either barren and capable of movement from place to place, or covered and stabilized with vegetation, but retaining its… …   Glossary of landform and geologic terms

  • parna —    A term used, especially in southeastern Australia and the southwestern USA, for silt and sand sized aggregates of eolian clay occurring as sheets or dunes.    Compare: parna dune.    SW & GG …   Glossary of landform and geologic terms

  • playa dune —    (colloquial: Southern High Plains)    A linear or curvilinear ridge of windblown, granular material (generally sand or parna) removed from the adjacent basin by wind erosion (deflation), and deposited on the leeward (prevailing downwind)… …   Glossary of landform and geologic terms

  • Lencois Maranhenses — Die Lençóis Maranhenses (Bettlaken von Maranhão) sind ein ausgedehntes Dünengebiet im Norden Brasiliens. Sie liegen an der Küste des Bundesstaats Maranhão. Geografischer Standort von Lençóis Maranhenses Ein Gebiet von 1550 km² wurde am 2. Juni… …   Deutsch Wikipedia

  • eolian —    Pertaining to material transported and deposited (eolian deposit) by the wind. Includes clastic materials such as dune sands, sand sheets, loess deposits, and clay (e.g., parna). HP …   Glossary of landform and geologic terms

  • eolian deposit —    [ soil survey ]    Sand, silt or clay sized clastic material transported and deposited primarily by wind, commonly in the form of a dune or a sheet of sand or loess. Conventionally, primary volcanic deposits (e.g., tephra) are handled… …   Glossary of landform and geologic terms