The Lagaccione crater is a Late Pleistocene explosive centre of the Vulsini volcanic district (42°34'N, 11°51'E, Central Italy); it was the site of lacustrine sedimentation until the last century, when it was completely dried out for agriculture. With the aim of outlining long-term variations of past climates and environments, sedimentological investigations were carried out on a 49.5 m long sequence cored in the lake bed centre. According to biostratigraphical considerations, radiocarbon datings and tephrochronology the lacustrine record spans approximately the last 100 ka. It consists of noncalcaerous silty sediments; fluctuations of mineralogical and geochemical characteristics with depth indicate that the biological productivity and the chemical leaching in the catchment area varied considerably on a regional scale as a consequence of three main temperate and/or wet phases, alternating with dry and/or cold climatic conditions. Considerations of sediment grain size and organic matter quality permit a schematic description of the evolution of the local palaeoenvironmental framework.
All Science Journal Classification (ASJC) codes
- Earth-Surface Processes