Abstract
Several lakes in northern Sweden have laminated sediments, of which many are interpreted as varved (annually laminated). In one of these lakes, a core of the recent sediment has been sampled annually since 1979 (except 1984). These cores verify that one varve, comprising of a thick summer layer (often colour-banded) and a thin winter layer, is formed each year. The cores also show, that, other than compaction, no change in visual appearance of the individual varves takes place after they have been overlain by new varves.
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References
Renberg, I., 1981a. Improved methods for sampling, photographing and varve-counting of varved lake sediments. Boreas 10: 255–258.
Renberg, I. 1981b. Formation, structure and visual appearance of iron-rich varved lake sediments. Verh. int. Ver. Limnol. 21: 94–101.
O'Sullivan, P. E., 1983. Annually laminated lake sediments and the study of Quaternary environmental changes — a review. Quat. Sci. Rev. 1: 245–313.
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Renberg, I. Photographic demonstration of the annual nature of a varve type common in N. Swedish lake sediments. Hydrobiologia 140, 93–95 (1986). https://doi.org/10.1007/BF00006731
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DOI: https://doi.org/10.1007/BF00006731