Wind-determined sediment distribution and Holocene sediment yield in a small,Danish, kettle lake |
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| Authors: | Bent Vad Odgaard |
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| Institution: | (1) Geological Survey of Denmark, Thoravej 8, DK-2400 Copenhagen NV, Denmark |
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| Abstract: | Sediment distribution was mapped by multiple corings in a small oligotrophic lake in northwestern Denmark. Sediment cores along a representative West-East transect were dated by 14C and correlated using pollen, mineral magnetics and general lithology. Estimates of whole-lake Holocene sediment accumulation were used to calculate sediment yield (terrestrial erosion). Results indicate that: 1) sediment yield was low 10000–5000 BP and increased strongly 5000–2500 BP and again 2500–1200 BP, 2) sediment focusing and waves and currents induced by strong winds were the major processes controlling sediment distribution throughout the Holocene; 3) the dominant wind direction of strong winds has been westerly throughout the Holocene; and 4) the lake was probably more productive in the last 5000 years than in the period from 10000 to 5000 BP. |
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| Keywords: | Lake sediment sediment focusing sediment yield terrestrial erosion Holocene climate Denmark |
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