Basin Margin

1
Basin Axis
Basin Margin
100
80
60
Broken shell ls
50
40
40
fault
80
40
60
20
Scallop bed
20
20
60
40
20
0
Cinder bed
0
Quartz s.s.
fault
Mammal bed
Great dirt bed
0
40
Subsidence
20
0
Durdle Door
Stair Hole
Lulworth Cove
20
0
Mupe Bay
Purbeck
Worbarrow Tout
0
20m
Portland
Durlston Bay