Volcanic sands of Iceland - Diverse origins of aeolian sand deposits revealed at Dyngjusandur and Lambahraun

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Description :
At both sites, the sand origin is determined from field observations (wind directions from ventifacts), chemical and mineralogical analyses of rocks and sands. At Dyngjusandur, the sand is dominated by glass grains, a situation typical of sand plains in Iceland. In the case of Lambahraun, prevailing winds indicate several potential sources of sand at the north of the sand sheet. Discrimination between the sources is based on a combination of morphological, mineralogical, and chemical data. Several hypotheses are tested, considering a single origin or multiple origins. Comparison of the 2 sites emphasizes the diversity of sand formation mechanisms in Iceland and the key role of glaciers.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2011, vol. 36, n°. 13, p. 1789-1808, nombre de pages : 20, Références bibliographiques : 60 ref.

Date :
2011

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley