Slope clay-with-flints ( biefs à silex ) as indicators of Quaternary periglacial dynamics in the western part of the Paris Basin, France

Benoît B. Laignel (1) , Florence Quesnel (2) , C. Spencer (2) , R. Meyer (1) , J. Lautridou (1)

1 M2C - Morphodynamique Continentale et Côtière
2 BRGM - Bureau de Recherches Géologiques et Minières (BRGM)

The lithology and distribution of the clay-with-flints occurring on slopes, called biefs à silex in French, suggests a twofold classification of these deposits according to slope angle. Biefs à silex formed as a solifluction deposit under Quaternary periglacial conditions during valley development. Two biefs à silex facies suggest two phases of development between 800 000 and 20 000 yr BP

Domains: Earth Sciences

Benoît B. Laignel, Florence Quesnel, C. Spencer, R. Meyer, J. Lautridou. Slope clay-with-flints ( biefs à silex ) as indicators of Quaternary periglacial dynamics in the western part of the Paris Basin, France. Journal of Quaternary Science, 2003, 18 (3-4), pp.295-299. ⟨10.1002/jqs.749⟩. ⟨hal-04083852⟩