Fig. 3

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Hypothèse de restitution de l’estuaire de la Denna entre les Xe et XIIe siècles (M. Lançon, sur la base du glossaire toponymique de C. Cercy, in Lançon et al., 2017), sur un extrait du fond de carte géologique 1/50 000 du BRGM (Leplat et al., 1988). A : « MzbD », « dunes et cordons littoraux sableux récents » ; B : « MzaS », « assise de Calais », sable ; C : « Mzb », « assise de Dunkerque », sable et limon-sableux ; D : « Mzb/T », « tourbe supérieure », tourbe recouverte par l’« assise de Dunkerque ».

Hypothesis for the restitution of the Denna estuary between the 10th and 12th centuries (M. Lançon, based on the toponymic glossary of C. Cercy, in Lançon et al., 2017) on an extract from the geological map 1/50 000 of the BRGM (Leplat et al., 1988). A: “MzbD”, “recent dunes and sandy coastal barriers”; B: “MzaS”, “assise de Calais”, sand; C: “Mzb”, “assise de Dunkerque”, sand and sandy loam; D: “Mzb/T”, “upper peat”, peat covered by the “assise de Dunkerque”.

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