parabolic dune

parabolic dune

[¦par·ə¦bäl·ik ′dün]
(geology)
A long, scoop-shaped sand dune having a ground plan approximating the form of a parabola, with the horns pointing windward (upwind). Also known as blowout dune.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Measuring Wind Flow and Sand Transport in the Lee of a Large Parabolic Dune. Brian Yurk, Brian Bodenbender, Suzanne DeVries-Zimmerman, and Ed Hansen, Hope College
Secondary blowout with low elevation appeared at the sand deposition zone due to differential erosion, behind which a parabolic dune developed with its own stoss slope and slope crest.
A small parabolic dune with sand at least 3.9 m thick (#12) was younger, dating to 13.2 + 0.6 ka.
Parabolic dune landscapes, along with associated slack environments, are considered worthy of protection (Pethick 2001) in north-west Europe, due to their specific floral and faunal habitats.
The result looks like a boomerang and is called a parabolic dune - the final growth stage of White Sands' dunes.
We initiated a geohydrological/ecological study of an interdunal slack/wetland in the deflation basin of a large parabolic dune ~200 m inland from Lake Michigan near Saugatuck, Michigan.
Hoffmaster State Park: a foredune, a 10-meter high blowout dune, and a 60-meter high parabolic dune. Our goals were to investigate the chronology, spatial patterns and sediment characteristics of the niveo-aeolian deposits found at these three environments.
The western edge abuts against a large parabolic dune. Sediments horn the western edge are rich in sand while sediments from the eastern edge are dominated by organic carbon and silt/clay.
The study area is at the southwest tip of a large parabolic dune. Outside the detailed study area, dune morphology, processes, and sites of activity have been more generally observed on the beach, foredune, dune ridge, parabolic dunes and blowouts of Hoffmaster State Park.
Figure 7 shows how this pattern can be interpreted as due to the episodic inland (from west to east) migration of parabolic dunes. Immediately to the north of this exposure the paleosols within the interior of a large parabolic dune (Dune 4) trace out portions of parabolas and thus appear to mark stages in the inland migration of a parabolic dune.
Green Mountain Beach Dune is a migrating parabolic dune, 400 m long and over 30 m high, 9 km southwest of Holland, Michigan.