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Processus Génétiques à l'origine des Formations de Pente à Graviers de Craie en Champagne

Author

Listed:
  • M. Laurain
  • H. Guérin
  • A. Marre
  • Et J. Richard

Abstract

En Champagne, des dépts de pente stratifiés crayeux connus sous le nom de ‘graveluche’ sont nombreux. Ils sont formés de dèbris calcaire dont la taille varie de 2 à 3 mm jusqu'à 1 à 2 cm et d'une matrice silteuse. Des lits gras alternent avec des lits maigres. Trois explications différentes ont été proposées pour en expliquer la genèse; il s'agirait soit: 1) de depots éoliens, 2) de dépǒts de solifluxion, 3) de dépǒts résultant d'écoulements gravitaires mal précisés. In Champagne, stratified chalky slope deposits, locally known as graveluche, are frequent. They consist of calcareous blocks, 2‐3 mm to 1‐2 cm in size, within a silty matrix. There is an alternation between lits gras and lits maigres (i.e. fine and coarser beds). Three explanations are proposed: eolian deposition, solifluction from upslope, and a gravity flow of some sort.

Suggested Citation

  • M. Laurain & H. Guérin & A. Marre & Et J. Richard, 1995. "Processus Génétiques à l'origine des Formations de Pente à Graviers de Craie en Champagne," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 6(2), pages 103-108, April.
    • Handle: RePEc:wly:perpro:v:6:y:1995:i:2:p:103-108
    DOI: 10.1002/ppp.3430060207
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