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Fauna and flora in submarine early Holocene lake-marl deposits from the southwestern Baltic Sea

Author:
Bennike, Ole, Lemke, Wolfram, Jensen, Jørn Bo
Source:
TheHolocene 1998 v.8 no.3 pp. 353-358
ISSN:
0959-6836
Subject:
Holocene epoch, carbon, carbonates, fauna, flora, lakes, littoral zone, pollen, radionuclides, sediments, snails, wetlands, Baltic Sea
Abstract:
Studies of plant and animal macrofossils have been carried out on early-Holocene lake marls from the southwestern Baltic. The records have been dated to the interval from c. 8500 to 7800 ¹⁴C years BP by correlating pollen assemblages to an onshore radiocarbon dated pollen diagram. The sediments contain from 5 to 81% carbonate, and only few macroscopic remains of wetland and terrestrial taxa. The plant and animal (mainly mollusc) macrofossils reflect deposition at the outer edge of the belt with submerged macro-limnophytes, in the lower littoral, perhaps at water depths at 4–7 m. The ratio between the shells and opercula of the snail Bithynia tentaculata points to some post-mortem disturbance, but it can be concluded that the water was highly alkaline and mesotrophic.
Agid:
6222411