Flashcards
PW 9
Cards in this deck (15)
- 1What are the sediment supplies?-Ice contact deposits
-Glaciofluvial deposits
-Iceberg rafted debris
-Marine input
-Suspended sediment
-Biogenic
-Land input
-Fluvial
-Rockall
Aeolian
-Gravity flow debris - 2What does the fjord-glacier complex look like?
- 3What does the glacio-marine debris cascade look like?
- 4What processes control the delivery of sediment at the grounding line?-Rate of ice melting
-Debris content of ice
-Forward velocity of the ice
-Supra/englacial
-Rate of melt out
-Surface streams
-Calving
-Subglacial
-Pushing/thrusting of glacial, fluvial and marine sediment
-Fresh water less dense than sea water, therefore overflow more important than underflow
-Meltwater affected by thermal regime
-Suspension affected by sald water
-Interaction of overflow plume with marine currents produces cyclopels/cyclopsams
-Interaction between meltwater outflow, tides and wind shear - 5What influence do marine environments have when they meet glaciers?-High calving rates
-Salt causes flocculation
-Causes them to coagulate and stick together
-Forms larger particles which drop out faster and quicker
-Cyclopells transport silty fine grained materials and cyclosands
-More course - 6How should the fjord-enivronment diagrams be interpreted?
- 7What would a facies succession look like?
- 8What is the oceanic shelf complex?-Instead of ice being bounded in narrow fjords, oceanic shelfs border continental shelves
-Null point is the switch point between evidence for glacial and oceanic point
- 9What would a facies succession look like for this area?
- 10What are Aeolian processes?-The susceptibility of glacial environments due to the wind
- 11Would factors increase the susceptibility?-Persistent glacier winds
-Lack of vegetation
-Large quantities of erodible sediment
-Fluctuating stream discharges
-Sort sediment particles - 12What are the two types of wind and what are they caused by?-Thermally induced
-Anabatic
-Slopes induce variation in receipt of solar radiation
-Katabatic
-Resultant pressure differences drive up valley/down valley wind - 13What is the scale of Aeolian depostion
- 14What are the Aeolian landforms?-Ripples
-Dunes
-Loess - 15How do all these process interact?
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- Flashcards on PW 9, created by erossmae on 25/08/2015.
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- erossmae
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