Eq2 Flashcards
Describe a Concordant coastline
occur where beds, or layers, of differing rock types are folded into ridges that run parallel to the coast. The outer hard rock (for example, granite) provides a protective barrier to erosion of the softer rocks
Describe a Discordant coastline
A discordant coastline occurs where bands of different rock type run perpendicular to the coast. The differing resistance to erosion leads to the formation of headlands and bays.
What are Joints
Small cracks in the layers if rock created during earth’s movements.
What is a Fault
A large crack in the rock caused by earthquake movements.
Examples of Soft rock
Clay and sands (erode quicker)
Examples of Hard rock
Limestone and chalk
What are headlands and bays
Headlands are formed when the sea attacks a section of coast with alternating bands of hard and soft rock.
How do caves form?
Caves occur when waves force their way into cracks in the cliff face. The water contains sand and other materials that grind away at the rock until the cracks become a cave. Hydraulic action is the predominant process.
How do caves form
waves force their way into cracks in the cliff face. The water contains sand and other materials that grind away at the rock until the cracks become a cave. Hydraulic action is the predominant process.