Book
French
ID: <
10670/1.q4f8kl>
Abstract
Le Lake de Saint-Point, located at an altitude of 850 m in the upper Doubs valley, has been the subject of a deep lake core, the date of which is supported by 24 radiocarbon dates. The sedimentary sequence (12.3 m), covering the entire Tardiglaciary and Holocene, provides an opportunity for a detailed study of the early anthropisation of the landscape. The first pollen indices of anthropisation appear at the heart of the mixed Atlantic oak; they are dated from 5400-5 300 cal. BC. From 4800-4 600 cal. BC and until the end of the Bronze age, a special agrarian system is in place. The plant environment remains very forest, but impacts are regular and repeated: clearing and peaks of cereal pollen, followed by peaks of pollen from grassland plants and finally increased pollen rates in heliophile and pioneer trees such as Juniperus (juniper) and Acer (maple).