Combined analysis diagram. From left to right: the age chronology calibrated before the present, lithostratigraphy, the sediment accumulation rate (year/cm), the organic carbon content (%), coals larger than 1 mm, carbonized seeds, microfauna remains, ichthyofauna and malacofauna, aquatic and terrestrial, sclerotia of Cenoccocum, remains of algae oogons, seeds of wetland plants, macro-remains of trees and forest plants, grasslands and wastelands, herbaceous plants not associated with a group. At the end of the diagram, the palynological data are summarized by the percentage of trees and herbaceous plants.