10Be exposure ages for the Late Pleistocene Gour de Tazenat maar (Chaîne des Puys volcanic field, Auvergne, France)

Evaluating Holocene natural hazards in the French Massif Central from a regional lake sediment approach

“…Lake Tazenat is the northernmost maar from the Chaîne-des-Puys and was formed within crystalline Palaeozoic rocks during the early Late-Glacial period between 29 and 34 kyrs (Valentine et al, 2019). This mesotrophic lake, located at an elevation of 633 m a.s.l., has a bowl shape morphology with a diameter of about 700 m covering an area of 0.6 km 2 (Fig.…”

“…Fig. 2) linked to the Limagne fault system (Valentine et al, 2019). Springs and stream bringing water to Lake Tazenat are influenced by regional faults and the hydrological drainage basin of the lake is thus probably larger than the topographic drainage basin.…”

“…As shown in Fig. 2, the Rochegude stream is incised within an elongated drainage basin (2.66 km 2 ) culminating at 753 m a.s.l along northern slopes of the Puy Chalard scoria cone (Juvigné and Stach-Czerniak, 1998;Valentine et al, 2019). The topographic catchment is characterized by up to 1 m thick gleyed soils covered by meadows, wooded areas and the Rochegude pond (De Crespin de Billy et al, 2000) formed after AD 1866, according to old regional topographic maps).…”