Formation of waterfalls Flashcards
1
Q
River flows over _________ types of rocks. ( step 1 )
A
alternative
2
Q
River erodes_______ faster creating a step. ( step 2 )
A
soft rock
3
Q
Further _________and ________ form a plunge pool beneath. ( step 3)
A
hydraulic action, abrasion
4
Q
Hard rock above is ________ leaving cap rock which collapses providing more material for Erosion. ( step 4 )
A
undercut
5
Q
Waterfall retreats leaving _________ _________ _______. ( step 5 )
A
steep sided gorge.
6
Q
Hard rock above is undercut leaving ______which collapses providing more material for Erosion. (Step 4)
A
cap rock
7
Q
River erodes soft rock faster creating a ____. (Step 2)
A
step
