Dear Colleagues,
You are invited to submit abstracts for the following session at
the XVII INQUA Congress (Cairns, Australia, 28 July - 3 August 2007).
Deadline for submission is 31st January 2007. Abstracts can now be
submitted through: http://www.inqua2007.net.au/
We are looking forward to receiving your abstracts.
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Landscape evolution processes in semi-arid environments: new insights
from OSL and cosmogenic nuclides:
David Fink (Australia), Ed Rhodes (Australia), Paul Bierman (USA)
Various methods and models have been used over the past few decades
to study rates of landscape change in arid and semi-arid regions.
Using advances in OSL techniques, new approaches in amalgamating
surface sediment samples, and modelling depth profiles of cosmogenic
nuclide concentrations, we are now able to quantify processes of
landscape evolution - sediment generation, transport, and storage in
arid and semi-arid environments over timescales from 1 ka to 1 Ma
integrated over areas ranging from 1 to 104 km2. The use of OSL
dating and cosmogenic nuclide ‘tracing ‘ of sediment across various
features starting from source regions on mountain peaks and exposed
bedrock, through transport and recycling within river-valley
systems, to distribution and deposition on piedmont surfaces,
terraces and alluvial fans has demonstrated that the diverse history
of individual grains can be integrated to provide a coherent
understanding of process and process rates. Using these tools,
existing paradigms of surface modification can now be tested
quantitatively.
In this session, we invite submissions which demonstrate the
application of these techniques to regional studies in semi-arid
systems, including regolith, dune fields, fluvial deposition, river
incision and piedmonts. Comparisons of denudation and sediment
generation rates between different regions and implications for
climate and/or tectonic forcing are most welcome.
Paul Bierman [log in to unmask]
UVM Geology Dept. Delehanty Hall
180 Colchester Avenue Burlington, VT 05405
802-656-4411( v) 802-656-0045 (fax)
uvm.edu/~pbierman
uvm.edu/perkins/landscape
uvm.edu/cosmolab
uvm.edu/irwe
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