resistant rocks such as igneous, granite and resistant sedimentary rocks
What structures do hard rock coastlines form?
High, vertical cliffs - despite their resistance, joints faults and cracks in cliff faces are more easily eroded by hydraulic action, this forms costal features such as caves arches and stacks
What are soft rock coastlines made up of?
less resistant rocks such as clays and shales which are more easily eroded
What kind of cliffs do soft rock coastlines form?
these are not as compacted as older rocks meaning they are less resistant to erosion and form less steep cliffs e.g holderness coast
What are the differences between the features of hard and soft rock coastlines?
Hard rock coastlines:
Steep cliffs
Bare cliff face with little vegitation
loose rocks at base
Soft rock coastlines:
Cliffs are less steep
Evidence of recent mass movement
Rapid rates of erosion
What is a discordant coastline?
A coastline with different layers of rock
What is a concordant coastline?
Coastlines of the same rock type
On what kind of coastline will you get caves, arches, cliffs and stacks?