F1+10 700–c. 8100 |
620–540 |
No foraminifera |
Admixture of fine sand; sulphide micronodules in the deepest layer; abundant fine and coarse plant remains (including seeds and characean oogonia), freshwater mollusc shell fragments |
Abundant cladoceran fauna (600–540 cm); occasional shells of limnic ostracods |
F2c. 8100–c. 6900 |
540–470 |
Foraminifera present; abundance fluctuates, but gradually increases to peak at 475–480 cm, and to decline thereafter; almost 100% domination of the Ammonia group, with a slight admixture of arenaceous forms; C/A ratio strongly in favour of calcareous forms |
The lowest layer still with cladoceran fragments; mud with admixture of fine sand; abundant plant remains |
Occasional hydrobiid snail shell fragments |
F3c. 6900–c. 6300 |
470–410 |
Maximum abundance; highest taxon richness; domination of the Ammonia group (occasionally not decalcified), but contribution of arenaceous forms fairly well visible; C/A ratio strongly in favour of calcareous forms |
Mud; some plant remains; admixture of fine sand |
Occasional brackish-water ostracods and mollusc shell fragments |
F4c. 6300–c. 3000 |
410–175 |
Abrupt decline in abundance; C/A ratio still in favour of calcareous forms, but agglutinated forms gaining in importance |
Mud; occasionally abundant plant remains; admixture of fine sand |
Fragments of mollusc shells; occasional valves of fresh- and brackish-water ostracods as well as cladoceran ephippia and carapace fragments |
F5c. 3000–present |
175–0 |
Fluctuating, generally low abundance (except for one layer with an exceptionally high abundance peak); domination of Eggerelloides scaber; C/A ratio very strongly in favour of agglutinated forms |
Plant remains; admixture of fine sand; occasional sulphide micronodules |
Mollusc shell fragments (e.g. Cardium), occasionally abundant; valves of fresh- and brackish-water ostracods |