This book describes how sand dunes work, why they are the way they
are in different settings, and how they are being studied.
Particular attention is paid to their formation and appearance
elsewhere in the solar system. New developments in knowledge about
dunes make for an interesting story – like the dunes themselves,
dune science is dynamic – and the visual appeal of Aeolian
geomorphology ensures that this is an attractive volume. The book
is divided into 4 parts, the first of which introduces dunes as a
planetary phenomenon, showing a landscape reflecting the balance of
geological processes – volcanism, impact, tectonics, erosion,
deposition of sediments. Dunes are then considered as emergent
dynamical systems: the interaction of sand and wind conspires to
generate very characteristic and reproducible shapes. Analogies are
given with other emergent structures such as patterned ground
before the influence of dunes on desert peoples and infrastructure
is studied, together with their use as forensic climatological
indicators. Dune Physics is looked at with regard to the mechanics
of sand, the physics of wind, saltation – interaction of sand and
air – dunes versus ripples and transverse Aeolian ridges, the
classification of dune morphology and the sources and sinks of
sand. Dune Trafficability considers soil mechanics, effects on
mobility on Earth, Mars and elsewhere. In the second part, Earth,
Mars, Titan and other moons and planets are examined, beginning
with a survey of the major deserts and dunefields on Earth. The
authors then turn to Mars and its environment, sediment type, dune
stratigraphy, sediment source and sinks and the association of
dunes with topographic features. Titan follows - its thick, cold
atmosphere, methane dampness, low gravity, morphology –
interaction with topography and the implications of dunes for
climate and winds. Dunes elsewhere conclude this part. There are
few dunefields on Venus, but there is a .possibility of Aeolian
transport on Triton and volcanic-related windstreaks on Io.
General
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