The Newbigging esker system, Lanarkshire, Southern Scotland: a model for composite tunnel, subaqueous fan and supraglacial esker sedimentation
Authors: Bennett, M.R., Huddart, D., Thomas, G.S.P.
Publication Date: 01/01/2009
Pages: 177-202
Abstract:The Newbigging esker system shows an ordered variation in stratigraphy and sedimentology within three morphological and spatially distinct landform assemblages: a single linear ridge, interrupted and terminated by shallow fans along its length; a series of multiple sub-parallel ridges and shallow fans, and a complex multi-ridge structure. The sedimentology of the system indicates a composite origin and the sedimentary architecture is consistent with the progressive infilling of a large lake basin by successive shifts in the sediment input as the ice margin retreated during the Late Devensian glacial stage. Quarry A consists of stacked overlapping, sand-dominated, wedges formed during a single episode of fan sedimentation as a result of flow expansion at the exit of a tunnel into the lake during a short ice-front still-stand. Quarry B consists of a boulder-rich tunnel-fill deposited in a single episode at the cessation of a high-magnitude discharge event. Quarry C, in contrast, was deposited in multiple episodes and consists of an upwards depositional transition from coarse tunnel deposition, into a subaqueous fan fronting the tunnel portal, and then into a supraglacial outwash sandur deposited in an ice-walled trough created by tunnel unroofing. This case study adds to the depositional models available with which to interpret complex esker and kame assemblages, both in the Scottish Highlands and elsewhere in the world. It also illustrates the need for caution when interpreting such assemblages due to their potential for polygenesis.
Source: Scopus
The Newbigging Esker, Lanarkshire, Southern Scotland: A Model for Tunnel, Subaqueous Fan and Supraglacial Esker Sedimentation
Authors: Bennett, M.R., Huddart, D., Thomas, G.S.P.
Editors: Hambrey, M.J., Christoffersen, P., Glasser, N.F., Hubbard, B.
Publication Date: 2007
Pages: 177-202
Publisher: Wiley-Blackwell
ISBN: 978-1-4051-8300-0
Source: Manual
Preferred by: Matthew Bennett