Lulworth Cove

Location & Background

Physical factors & Processes

Coastal Landforms

How and why landscapes change over time

World heritage sight

Stages of erosion on a concordant coastline

processes have been operating over the past 8000 years

joints and cracks in the rock

weaker Purbeck bed erodes faster than Portland limestone

wave refraction allows lateral erosion

attrition operates on sediment on beach making it smaller, smoother and rounder

sub aerial processes operating on the coastline include saltation, crystallisation and wetting & drying

Lulworth cove expands as he softer rock which the cove is made out of gets eroded away

biological and freeze thaw weathering are the dominant processes acting on the landscape

pounding, sub aerial, hydraulic action all occur at the cliffs base

the durdle door arch will probably at some point collapse as the rock weakens through weathering to then turn the edge of it into a stack then eventually after erosion a stump

Stair hole

Durdle Door

Lulworth cove

St Oswalds bay

Embryo cove: seas first breach of Portland limestone, thinner bedding in the Purbeck limestone so more weaknesses for the processes to attack

Processes: hydraulic action, attrition,abrasion,corrosion

processes utilise weaknesses in the rocks

Located in Dorset on the south coast

Evidence of erosion

Wealden slumping of clay

Chalk pebbles on the beach

purbeck blocks can be seen broken on the beach

What occurs when two coves join up

Sea trying to starighten coast again

Portland limestone blocks in water sign of erosion

Bay has been straightened

erosion of chalk leaves stack and stump

Caves due to faulting

Dry valleys

Wave energy gets dissipated on shingle beaches