Morphologically induced density lag formation on bedforms and biogenic structures in aeolian sands

In a variety of sand-dominated depositional settings, an increase in near-surface wind velocity typically culminates with the formation of a lag deposit, such as an increase in coarse fraction, accumulation of shell fragments, or a concentration of heavy minerals (density > 2.9 g/cm3). This study...

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Bibliographic Details
Published in:Aeolian research 2012-12, Vol.7, p.11-15
Main Author: Buynevich, Ilya V.
Format: Article
Language:English
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Summary:In a variety of sand-dominated depositional settings, an increase in near-surface wind velocity typically culminates with the formation of a lag deposit, such as an increase in coarse fraction, accumulation of shell fragments, or a concentration of heavy minerals (density > 2.9 g/cm3). This study presents examples from six coastal dune sites where prominent heavy-mineral concentrations (HMCs) are confined to the crests of aeolain ripples and marginal ridges of biogenic structures. In settings with low background fraction of heavy minerals (2a5%), micro-topographic highs (500 MHz) georadar imaging.
ISSN:1875-9637
DOI:10.1016/j.aeolia.2011.12.005