Environmental impact on the Late Pleistocene and Holocene soil erosion in the “Lac Du Bouchet” maar crater (Massif Central, France)

Preservation of the last aggradation phase in climate‐driven terraces: Evidence from Late Quaternary reach‐specific fluvial dynamics of the Allier River (France)

“…They yielded an approximately 15 ka delayed/averaged climate‐dependent landscape erosion signal (Schaller et al ., 2002) which was supported by a lake sediment budget estimate for the last 13 ka (Macaire et al ., 1997, 2010). A similar longer‐term and more detailed sediment supply record has been reconstructed for the Le Bouchet lake (see Figure 1 for location) (Degeai and Pastre, 2009).…”

“…In Figure 12 we combined the modelled sediment supply curve for the higher western volcanic tributaries (Veldkamp et al ., 2016) with the 10 Be erosion rates curve of Schaller et al . (2002) and the Le Bouchet lake landscape erosion curve (Degeai and Pastre, 2009). In the same figure we also plotted the Allier sediment composition change.…”

“…FIGURE 12. Compilation of simulated landscape erosion rates (Veldkamp et al, 2016), 10 Be denudation rates (Schaller et al, 2002) and reconstructed erosion rates from Lac du Bouchet record (Degeai and Pastre, 2009). Allier Fx terrace sediment composition in time as (TiO 2 + MgO, %) (Veldkamp, 1991, p. 96) When we look at the time gaps in the preserved Fx terrace records, it appears that we have three different reaches.…”

Last glacial fluctuations in the southwestern Massif Central, Aubrac (France): First direct chronology from cosmogenic 10Be and 26Al exposure dating

“…This climatic amelioration was coeval with a general trend of slope stabilisation caused by the development of vegetation cover across the whole of the Massif Central (Fig. 9) (Reille and Beaulieu, 1988;Vergne, 1991;Degeai and Pastre, 2009;Gandouin et al, 2016;Ponel et al, 2016). These milder climatic conditions potentially led to glacier recession into higher elevation cirques of the Cantal and Monts Dore massifs (Veyret, 1978;Valadas, 1984;Vergne, 1991).…”

“…In the Alps, the progressive starvation of Mediterranean moisture triggered glacier recession (Luestcher et al, 2015;Wirsig et al, 2016 and references therein). On non-glaciated slopes of the southwestern Massif Central, reduced gelifluction and gelifraction processes were associated with this period and highlight the climatic aridity (Valadas, 1984;Van Vliet-Lanoë et al, 1991;Degeai and Pastre, 2009) (Fig. 9).…”