Fluvial Landforms - Caused by Erosion (AQA GCSE Geography): Flashcards
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Erosion by rocks wearing down river bed
Erosion by rocks wearing down river bed
Abrasion
Rock type eroded more at a waterfall
Rock type eroded more at a waterfall
Softer rock
What happens to hard rock at waterfalls
What happens to hard rock at waterfalls
Undercut by erosion, becomes unsupported & collapses
Deep pool at waterfall base formed by abrasion
Deep pool at waterfall base formed by abrasion
Plunge pool
Landform left as waterfall retreats
Landform left as waterfall retreats
Steep-sided gorge
River course where interlocking spurs form
River course where interlocking spurs form
Upper course
Why rivers wind around hillsides in upper course
Why rivers wind around hillsides in upper course
Not powerful enough to erode laterally
River courses where meanders develop
River courses where meanders develop
Middle and lower courses
Current speed on outside of meander
Current speed on outside of meander
Faster
What happens on inside of meander
What happens on inside of meander
Deposition of eroded material
Feature formed on outside of meander bend
Feature formed on outside of meander bend
River cliffs
Feature formed on inside of meander bend
Feature formed on inside of meander bend
Slip-off slopes
Term for fastest flow through a meander
Term for fastest flow through a meander
Thalweg
How does an oxbow lake form from a meander?
How does an oxbow lake form from a meander?
Neck eroded, cuts through in flood, deposition seals it
What happens to meanders over time
What happens to meanders over time
Get larger, can form oxbow lakes