North West Geography
Volume 1, Number 2, 2001
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Abstract
The paper provides a methodology for teaching and learning of catchment landform and
processes and their linkages to the dynamic behaviour of river channel form and process. Fieldwork is
described. An overview is provided of the processes and landforms in the study area.
The paper is focused on teaching and learning. In addition it emphasises the need and importance of
research into two key areas: (1) the spatial and temporal variation in sediment sources and their direct linkage
to channel change using tracer studies; (2) the quantification of sediment-borne heavy metal contamination in the
river channel and the efficacy of current engineering works in reducing contaminated sediment transfer to the
channel and enhancing channel stability.
Abstract
The Ballymahon esker, central Ireland, is one of a series of eskers formed shortly after
a drumlinising event towards the end of the last glaciation. It lies within a belt of composed of segments, each
of which comprises a narrow, sharp-crested ridge composed of coarse-grained sediments leading down-ice to a
flat-topped terminus. The segments are interpreted as subglacial tunnel/channel to ice-marginal ‘beads’, deposited
sequentially as the ice margin retreated. Tunnel/channel deposits underlie the esker remnants, indicating that
short-lived drainage routeways existed to either side of the main routeway during ice margin retreat.
The evidence indicates that deglaciation in this area was characterised by stagnation-zone retreat, rather
than mass in situ downwasting of the ice.
Acknowledgement
This is a report on an ongoing research project into aspects of
remembering and identity amongst Irish migrants in Manchester in the last decades of
the nineteenth and the first years of the twentieth century. In 2000 Manchester Geographical
Society kindly awarded me a grant which was used to begin reading into the subject and start
gathering empirical data.
Ordnance Survey 25 inch maps:
Rochdale (South), 1908