Beaches And Features, Erosion Transportation Hard And Soft Engineering Flashcards
Good bud
For a sand Dune to form it needs
A large flat beat a large supply of sun a large
tidal range so there is time for the sun to dry
an obstacle such as drift was for the doing 2 for against
an onshore wind to move sand to the back of the beach
Step one to sand dunes
Towards the back of the beach sand gathers around deposited material such as wood or rock these are embryo dunes
Step 2 on sand dunes
We develop and become more stable when vegetation grows around the embryo dunes plants such as marram grass are ideally suited to the condition
Step 3 in sand dunes
In time rotten vegetation makes the sand more fertile and more plants grow in the back dunes .
Step 4 in San Dune formation
Wind can form depression in the Sand call Ed slacks ponds may form in these
Where is Dorset
Dorset is a county in southwest England on the English Channel coast it has a population of 771900
What is Dorset known 4
It is known for the Jurassic Coast a long stretch on the English Channel where the Rock formation shows millions of years of geological history
The power of the ways depends on the distance they all have to travel this is called the
Fetch
What two forces are needed for the way to become more powerful
The wind and distance the fetch
Which coast in Southern England is impacted the most
The southern west coast
What two categories of Rock shape southern England coast
Hard and soft
In Dorset coast what type of rock is on the outside facing the sea
Hard Rock
In the Dorset coast what is the name of the hard rock
Portland Rock
What does the Portland rock do
It acts like armour it protects the soft rock
Hard Rock
Some rocks are hard and resistant to erosion
Soft rocks
Shamrocks are soft and easily
Examples of soft rocks
Sedimentary rocks such as clay and Shale
Examples of hard rocks
Igneous rocks such as granite or basalt and sedimentary rocks such as limestone and sandstone also chalk
How are igneous rocks are formed
They are formed by magma from molten Interiors of the Earth
How are sedimentary are formed
They are formed from sediments that have settled at the bottom of the ocean or sea
What kind of Cliffs do hard rocks produce
They produce vertical Cliff profile e.g. caves Arches and stacks
What kind of Cliffs do soft rocks produce
They produce less steep Cliff profile
Concordant coastlines
When a coastline has the same type of rock along it’s length B
Discordant coastlines
Coastlines where the geology alternates between bands of hard rock and soft rock a
What is a beach
Zone of deposited material that extend from the no water line to the limit of a storm wave
What is a bar
Where a spit grows across a bay can eventually and close the way to create a lagoon
What is a spit
Formed when a finger of sediment extends for the Shore out to see often at a river mouth
How are beaches formed
Beaches are formed by constructive waves where the swash is stronger than the backwash sediments slowly deposits
How are steep beaches formed
Steep beaches are formed when powerful destructive waves this means pebbles are now moved far up the beach resulting in a steep beach
What are ridges called on beach
A b e r m