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Grèzes, grèzes litées: Historique des définitions

Author

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  • J.‐C. Ozouf
  • J.‐P. Coutard
  • J.‐P. Lautridou

Abstract

The terms grèze and grèze litée, introduced by Y. Guillien to define a special type of slope deposit, are often not well used by authors. It is necessary to recall the initial definitions. The grèze is a sandy and gravelly material produced by frost shattering: mode 2.5 mm, maximum size 25 mm. The use of the term éboulis ordonnés as a synonym for grèze litée should be avoided because this type of deposit accumulates by solifluction and runoff processes, not by successive rockfalls. L'utilisation souvent abusive des termes de 'grèze' et de 'grèze litée', introduits initialement par Y. Guillien pour définir un type particulier de dépǒts de pente, nous a amenés à rappeler leur définition exacte. On doit revenir à la définition granulométrique de Guillien: matériau fait de gravillons, mode 2.5 mm, limite supérieure 25 mm, pour caractériser ces dépǒts et proscrire également l'emploi du terme 'éboulis ordonnés' comme synonyme de 'grèze litée', l'éboulisation n'intervenant pas dans la mise en place de ce type de dépǒt.

Suggested Citation

  • J.‐C. Ozouf & J.‐P. Coutard & J.‐P. Lautridou, 1995. "Grèzes, grèzes litées: Historique des définitions," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 6(2), pages 85-87, April.
    • Handle: RePEc:wly:perpro:v:6:y:1995:i:2:p:85-87
    DOI: 10.1002/ppp.3430060205
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