New PDF release: Glacier Science and Environmental Change

Environmental Studies

By Peter Knight

Glacier technological know-how and Environmental swap is a finished reference paintings studying modern concerns in glaciology and explores the interface among glacier technological know-how and environmental swap, prior, current, and destiny.

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S. 12 Safety factors at the topmost transducers in the till at 12 m, 30 m, 65 m, 85 m and 125 m along the transect shown in Fig. 3. The heavy line shows the glacier margin through time. The maximum ice thickness was achieved at about 195–200 days. The smallest safety factors (strongest deformation) occur early on during the advance; the largest safety factors (maximum effective pressures and pre-consolidation) occur after the period of maximum loading, when a more efficient drainage system had been established.

6b, would be enormously attenuated, recognized only as thin, subhorizontal sandy lenses or wisps. 5 m in Fig. 6. Moreover, if local stress concentrations, or local increases in frictional resistance or consolidation on the surface over which it shears, produce folding, these laminae will tend to become progressively more strongly mixed into the deforming mass, to produce a homogenized sediment. If such mixing by folding occurs, horizons that originally lay at the base of the rapidly shearing mass could be translated to the top, and vice versa.

14. 14 Modelled palaeohydraulic patterns based on the distribution of eskers (N–S lines) and bedrock conductivities in the area north of the Salpausselka moraines in Finland. Scale in kilometres. (a) Simulated water pressures in bedrock as a proportion of ice pressure. 4) would produce larger water pressures at the ice–bed interface. (b) Groundwater flow vectors in bedrock. They are strikingly similar to the patterns that would be expected in unglaciated temperature regions. 22 G. S. Boulton dominant groundwater flow vector would be transverse to ice flow and not parallel to it as suggested by Boulton et al.

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