The palaeomagnetism and magnetic fabric of sediments from Peak Cavern, Derbyshire |
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| Authors: | Mark Noel |
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| Institution: | Department of Geology, University of Sheffield, Beaumont Building, Brookhill, Sheffield S3 7HF |
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| Abstract: | Summary. This paper describes the magnetic remanence and susceptibility anisotropy of 42 samples of laminated clay from Peak Cavern. The sediments are shown to have acquired a stable remanent magnetization due to the depositional alignment of magnetite grains. The magnetic fabric data confirm the existence of alteration within a reddened surface layer. A record of geomagnetic secular variation in the underlying clay is compared to a dated lake sediment magnetostratigraphy to suggest that deposition occurred around 7000 yr bp . A method for estimating water current directions based on the remanence and magnetic fabric data is critically assessed before deducing the sense of palaeoflow in the cave. |
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| Keywords: | caves karst palaeomagnetism Quaternary |
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