weathering and mass movement

HideShow resource information
name the 3 types of weathering...
mechanical (freeze thaw), chemical(acid rain), and biological
1 of 8
mechanical..
when water freezes it expands by 10%, causing stresses within the rock. when the ice melts, water seeps deeper within the crack. after repeated cycles of this, fragments of rock might break off
2 of 8
chemical
rain water = slightly acidic, when rain falls on rocks such as limestone, a chemical reaction takes place, causing the rock to weaken and break down
3 of 8
biological
the roots of growing plants can wides cracks in cliff rocks, burrowing animals and nesting birds on cliff faces can also cause the rock to weaken and break up
4 of 8
Mass movement.. what types
rock falls, slumping and sliding
5 of 8
rock falls
when pieces suddenly fall off from a cliff that has been weathered or undercut
6 of 8
slumping
often occurs after long periods of rainfall - rain seeps through soil and permeable rock such as sandstone. -at the junction where permeable rock meets impermeable rock such as clay, the saturated rock slumps and slips
7 of 8
sliding
similar to slumping but along a flat surface usually a bedding plane. large amounts of soil and rock move downslope rapidly
8 of 8

Other cards in this set

Card 2

Front

mechanical..

Back

when water freezes it expands by 10%, causing stresses within the rock. when the ice melts, water seeps deeper within the crack. after repeated cycles of this, fragments of rock might break off

Card 3

Front

chemical

Back

Preview of the front of card 3

Card 4

Front

biological

Back

Preview of the front of card 4

Card 5

Front

Mass movement.. what types

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Geography resources:

See all Geography resources »See all Coastal zones resources »