Concordant Coastlines and Rock Types

The video explains concordant coastlines, where rock layers run parallel to the sea, forming a natural defense against erosion. Hard limestone faces the sea, with softer clay and chalk behind it. Over time, the sea erodes the softer layers, forming coves like Lulworth Cove in Dorset. The video contrasts this with discordant coastlines, where rock layers are perpendicular to the sea.

What type of coastline is discussed in the video?

• Submergent

• Emergent

• Concordant

• Discordant

How do the rock layers run in a concordant coastline?

• Perpendicular to the sea

• Parallel to the sea

• Diagonal to the sea

• Randomly oriented

What is the main difference between concordant and discordant coastlines?

• Tidal range

• Wave energy

• Rock orientation

• Rock type

What type of rock faces the sea in the concordant coastline example given?

• Clay

• Chalk

• Limestone

• Sandstone

What is the role of the hard limestone in a concordant coastline?

• It creates sand dunes

• It forms beaches

• It acts as a defensive wall

• It erodes quickly

What happens when the sea breaks through the hard rock layer?

• It stops eroding

• It erodes the softer rock behind

• It creates a beach

• It forms a cliff

What type of feature is formed when the sea erodes the softer rock behind the hard rock?

• Sand dune

• Cliff

• Cove

• Beach

What type of rock is found behind the clay in the concordant coastline example?

• Granite

• Chalk

• Sandstone

• Limestone

Why does the erosion stop when the sea reaches the chalk layer?

• Chalk is less dense

• Chalk is more resistant

• Chalk is impermeable

• Chalk is softer

What is the name of the cove mentioned as an example in the video?

• Old Harry Rocks

• Chesil Beach

• Lulworth Cove

• Durdle Door