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attrition

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Attrition


In earth science, the process by which particles of rock are rounded and gradually reduced in size by hitting one another as they are transported by rivers, wind, or the sea.

The rounding of particles is a good indication of how far they have been transported. This is particularly true for particles carried by rivers, which become more rounded and smaller as the distance downstream increases. Thus the load of a river is often large and jagged in its upper course, and smaller and rounder in its lower course.

© Research Machines plc 2008. All rights reserved. Helicon Publishing is a division of Research Machines plc.


 
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ablation
abrasion (earth science)
alluvium
arête
arch (earth science)
attrition
bar (earth science)
bay (earth science)
beach
cave
cavitation (earth science)
channel efficiency
coast
coastal cliff
coastal deposition
coastal erosion
coastal protection
confluence
conglomerate (geology)
corrasion
corrie
corrosion
dam
delta
deposition (earth science)
drainage basin
drumlin
dune
erosion
erratic
esker
estuary
fjord
flood plain
flooding
freeze–thaw
glacial deposition
glacial erosion
glacial trough
glacier
glacier budget
gorge
groyne
hanging valley
headland
headward erosion
hydraulic action
hydraulic radius
hydrograph
ice age
incised meander
interlocking spur
irrigation
lake
levee
longshore drift
meander
misfit valley
moraine
nivation
oxbow lake
periglacial environment
playa
pyramidal peak
rejuvenation
ria
river
river capture
river terrace
salt marsh
saltation (earth science)
scree
solution (earth science)
spit
stack (earth science)
storm surge
stump
suspension (earth science)
tide
till
truncated spur
V-shaped valley
valley
waterfall
wave (earth science)
wave-cut platform

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