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Swiss Journal of Geosciences
Fig. 14 | Swiss Journal of Geosciences

Fig. 14

From: Holocene environmental changes and human impact in the northern Swiss Jura as reflected by data from the Delémont valley

Fig. 14

Synthetic diagram for the Holocene of the Delémont valley (12,000 cal BC–1,500 cal AD). a Evolution of the Pran floodplain. Change of time scale at 1,000 cal BC is due to abundant data for the period up to 1,500 cal AD. Parallel to sites phasing, palaeohydrological curve points rises (+) and lulls (−) of hydrological flow. Erosion includes episodes of floodplain downcutting and gully formation on slopes. Soil genesis on the contrary indicates relative landscape stability. b Evolution of the Birse floodplain. c Evolution of the vegetal cover results from pollen analysis realised at Site 1 (Courfaivre-La Faverge). d Comparison with the high lake-level periods from France and Switzerland (Magny 2013). Six episodes (Nos. 15*, 8*, 6*, 5*, 3* and 1*) can clearly be correlated to hydrological rises and erosion phases in the study area

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