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Conference Papers Year : 1994

The ignifracts of the Sainte-Victoire mountain (Lower Provence, France)


This paper deals with the first French, even world-wide, survey of ignifracts. A statistical study of 162 objects has shown that the average flattening index (Ia = 5.6) is much greater than that of gelifracts. There is no correlation between this index and the lithology of the samples studied. Ignifraction is a specific case of thermoclasty ; its main characteristics are its high efficiency (up to 22,500 g/m2 of ablation in a few minutes) and its high spatial variability, the causes of which have not yet been clearly established.
Este trabajo es la primera investigacion francesa, o incluso mundial, sobre los ignifractos. Un estudio estadictico de 162 objetos ha demonstrado que el indice medio de aplanamiento (Ia = 5.6) es mucho mayor que el de los gelifractos. No existe correlacion entre este indice y la litologia de las muestras estudiadas. La ignifraccion es un caso especifico de termoclastia ; sus principales caracteristicas son su alta eficacia (mas de 22,500 g/m2 de ablacion en unos pocos minutos) y su elevada variabilidad espacial, cuyas causas han sido claramente establecidas.
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hal-01564048 , version 1 (20-07-2017)


  • HAL Id : hal-01564048 , version 1


Jean-Louis Ballais, Marie-Christine Bosc. The ignifracts of the Sainte-Victoire mountain (Lower Provence, France). Soil érosion and degradation as a conequance of forest fires, 1994, Barcelona, Spain. pp.217-227. ⟨hal-01564048⟩


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