1.4(Spec2) - Concordant Morphology Flashcards
1
Q
What is a Haff type coastline?
A
- ridges are made of sediment deposits
- ridges run parallel to coastline
- sea level rises
- lagoons created between ridges and shore
2
Q
What is a Dalmatian coastline?
A
- synclines created through river erosion
- synclines are strata of softer rock
- sea level rise drowns synclines
- anticlines are visible (as islands)
3
Q
What are concordant coastlines?
A
- rock strata is parallel to sea
- harder rock is eroded through to reach softer rock
- can be folded into synclines and anticlines
4
Q
What sort of coastline is the South Dorset Coast?
A
- concordant
5
Q
What are the strata at the South Dorset Coast?
A
- Portland Limestone, is the strata closest to sea
- is more resistant
- Purbeck Limestone and Wealden Clay are behind Portland
- weaker
6
Q
What has happened where Portland limestone has been eroded through?
A
- softer strata behind eroded quickly
- creating series of coves
- have narrow opening, expand laterally
- eg. Lulworth Cove
7
Q
What has happened when multiple coves form?
A
- have combined to create a single bay
- resulting in outer Portland left as a line of stumps parallel to coast
- eg. Bull’s Head in St Oswald’s Bay
8
Q
What is the orientation of the Dalmatian coastline?
A
- concordant
9
Q
How was the Dalmatian coastline made?
A
- African and Eurasian plates collided
- compressed as a result
- created anticlines and synclines
- flooded synclines when glaciers melted
