Bedrock versus superficial deposits in the Swiss Jura Mountains : what is the legitimate soil parent material?

Auteur(s) et Affiliation(s)

Inst. of Geology and Palaeontology, Univ., Lausanne, Suisse
Inst. of Geology and Palaeontology, Univ., Lausanne, Suisse
Inst. of Geology and Palaeontology, Univ., Lausanne, Suisse

Description :
In the Swiss Jura Mountains, characterization and distribution of superficial deposits along a toposequence are used in order to decipher the polygenic sources of soil parent materials and question the importance of lithodependence in soil development. The in situ weathering material and the allochtonous deposits are discriminated through analysis of mineralogical composition, grain size distribution of the soil mineral fraction, and multivariate statistical treatment. It is highlighted that loess material originates from Alpine moraines of the Swiss Plateau and is mixed with deposits originating from more proximal Jura moraines, diluting the Alpine signature. Consequently, the soil development does not follow the expected and conventional decalcification process, but is directly influenced by the origin of the primary sediments (even when present only in small amounts) and their evolution.

Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2013, vol. 38, n°. 4, p. 331-345, nombre de pages : 15, Références bibliographiques : 1 p.

Date :

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

Langue :
Droits :
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