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Country: Switzerland
Varve Category: clastic varves
Archive Type: lacustrine sediments
Lake Type: glacial lake
Maximum Depth: 32.0
Catchment Area: 168.7
Surface Area: 8.45
Elevation: 435.0
DOI / Reference Link: Access Link
Reference: Zolitschka B., 2007. Varved lake sediments. In: S. A. Elias (ed.), Encyclopedia of Quaternary Science. Elsevier, Amsterdam, pp. 3105-3114.
Picture Authors: Michael Sturm
whole core compared to a meter stick

Description: Varved lake sediments from Greifensee (Switzerland). The upper 26 cm of this freeze core image display the history of cultural eutrophication through the formation of carbonaceous organic varves since 1930. Below 26 cm the productivity of the lake was lower, no oxygen depletion occurred near the lake floor and thus organic matter was not preserved.
Picture Type: macroscopic