Definitions on coastal landscapes and physical processes that impact erosion Flashcards
What is a concordant coastline?
A concordant coastline has the same type of rock along its length. Concordant coastlines tend to have fewer bays and headlands.
It also continuously goes along the coastline
What is a discordant coastline?
It is when coastlines where the geology alternates between bands of hard rock and soft rock are called discordant coastlines
What is a headland?
Headlands are usually made of resistant rock that have weakness like cracks. Cracks occur when waves crash against them mainly by hydraulic power and abrasion.
What is abrasion?
Eroded particles in the water to scrape and rub against rock, removing small pieces.
What is hydraulic action?
It is when waves crash against rock and compress the air in the cracks. This puts pressure on the rock.
What is attrition?
It is when rock fragments grind and rub each other down into smaller and smaller fragments.
What is deposition?
Deposition is when waves carrying sediment drop (deposit) it.
What is solution?
It is dissolved chemicals often derived from limestone or chalk
What is suspension?
Small particles carried (suspended) within water.
What is saltation?
It is a hopping or bouncing motion of particles too heavy to be suspended.
What is traction?
They are large pebbles rolled along the seabed.
