1
Q
How does varying resistance create complex cliff profiles?
A
- weaker strata below can be eroded faster, creating wave cut notches
- wave cut platforms form when harder overhang is too heavy for weaker strata to support
2
Q
How does varying permeability create complex cliff profiles?
A
- groundwater flow can exploit joint structure and dissolve binding materials
- can create high pore water pressure within cliff, reduces stability
- can also lead to slumping along impermeable/permeable boundary if seaward dip
3
Q
What rocks are permeable?
A
Sandstone
Limestone
4
Q
What rocks are impermeable?
A
Most igneous rocks
Most metamorphic rocks
Mudstone
Clay
5
Q
What factors add to the complexity of a coastal formation ?
A
Age of rock
Variation in permeability of rock
Variation in resistance of rock
6
Q
What are the properties of the entablature?
A
Made of laterite
More permeable than colonnade
Not regularly arranged
7
Q
What are the properties of the colonnade?
A
Basalt columns
Jointed horizontally and vertically
Less permeable than entablature
8
Q
How are entablatures formed?
A
Rapid cooling of basalt columns from top downwards by water
9
Q
How are colonnades formed?
A
- Slow cooling of basalt from bottom upwards
- Creates joints as basalt contracts as it cools
8GE01 - Coasts
flashcards
Decks in class (33)
# Cards
-
1.18
-
1.29
-
1.3(Spec2) - Cork5
-
1.4(Spec2) - Concordant Morphology9
-
1.54
-
1.6(Spec2) - Submergent Coastlines + Sognefjorden11
-
1.72
-
2.113
-
2.218
-
2.39
-
2.44
-
2.511
-
2.6(Spec1)7
-
2.72
-
2.8(Spec2) - Mass Movement + Barton18
-
2.95
-
2.10 - W Africa8
-
2.113
-
2.129
-
2.13 - Trinidad And Tobago16
-
3.2 - Sediment Cells13
-
3.3(Spec2) - Deposition + Distinctive Landforms16
-
3.46
-
3.514
-
3.6 - New York11
-
3.7 - Bangladesh13
-
3.8 - Kiribati8
-
3.9 - Netherlands17
-
4.1(Spec2) - Portballintrae + Lyme Regis25
-
4.6 - Chittagong7
-
4.37
-
4.5 - Slapton Management13
-
4.4 - ICZM7
