Fluvio-lacustrine cyclothems from the Oligocene of Hampshire
- 1 March 1973
- journal article
- research article
- Published by Cambridge University Press (CUP) in Geological Magazine
- Vol. 110 (3), 235-242
- https://doi.org/10.1017/s0016756800036062
Abstract
Each fluvio-lacustrine cyclothem may include the following lithotypes (in ascending order): (a) irregularly laminated silts and muds; (b) regularly laminated muds and silts; (c) muds with or without molluscan partings and bands; (d) colour mottled muds. Each cycle reflects a change from flowing water conditions (fluvial) to non-flowing water conditions (lacustrine), culminating in some cases with the formation of marsh. Each lithotype is thought to represent the environmental changes which resulted from the silting up of inter-channel depressions on a flood plain. Successive cyclothems possibly reflect renewed flooding following an increase in river level during more pluvial periods.Keywords
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