Premium
Magnetic studies of erosion in a Scottish lake catchment. 1. Core chronology and correlation 1
Author(s) -
Appleby P. G.,
Dearing J. A.,
Oldfield F.
Publication year - 1985
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1985.30.6.1144
Subject(s) - chronology , erosion , geology , sedimentation , watershed , drainage basin , sediment , hydrology (agriculture) , sediment core , physical geography , paleontology , geomorphology , geography , cartography , geotechnical engineering , machine learning , computer science
Magnetic susceptibility, 210 Pb, 137 Cs, 14 C, and paleomagnetic secular variation are used to establish the chronology of sedimentation in a set of cores from Loch Frisa in western Scotland. The 14 C dates obtained are not compatible with the chronology derived from all the other techniques and this is ascribed to inwash of “old” particulate carbon from the watershed. Central cores show little evidence of changes in sedimentation rate over the last 150 years whereas marginal cores contain evidence of major increases arising from ploughing and from drainage associated with catchment afforestation since 1935. The results illustrate the value of a multiple core approach to sedimentation and erosion studies even where complex lake morphometry precludes calculation of sediment budgets.