Transcript The Dorset Coast

The Dorset Coast
(and a little bit of Hampshire!)
~ a virtual field trip ~
I took this picture!
Where it is located
Day 1– The journey to Dorset!
Day 2 – Lyme Regis to Ringstead Bay
Groynes
An aerial photo of Lyme
Regis Bay, showing ‘The
Cobb’ (Harbour) and where
the River Lim meets the sea
Lyme Regis ~ Charmouth ~ Golden Cap
Golden Cap
The coast is unstable because there are numerous situations where porous
strata, principally the Chalk and Upper Greensand, lie over impermeable clays.
Black Ven between Lyme
Regis and Charmouth.
Upper Greensand lies
over Lower Jurassic clays.
The largest coastal
mudflow in Europe took
place here in the winter of
1958/9
The cliff top at Black Ven
How Landslides occur
Chesil Beach
Isle of
Portland
The Fleet
The gradient of the beach
can get very steep
West Bay (west)
Pebbles are ’sorted!’
Portland (east)
The Isle of Portland
When the island was uplifted, a series of
massive fractures developed in the limestone.
Weymouth
Weymouth is a traditional seaside resort. It
is protected by the Isle of Portland.
Portland Harbour (South of Weymouth)
White Nothe Headland from Ringstead Bay
Day 3 – Ringstead Bay to St. Alban’s head
Durdle Door ~ Lulworth Cove ~ Stair Hole ~ Warbarrow Bay ~
Tynham ~ Broad Bench ~ Kimmeridge ~ Winspit
Durdle Door ~ A Limestone Arch
Eventually the arch
will collapse to
leave a sea stack
Lulworth Cove
Chalk Hills stop the
cove eroding any
further inland
Soft sand and clays
Limestone Headlands
Stair Hole
Small arch is only
gap in the limestone.
Marine processes
eroding further inland
The formation of Lulworth Cove, Stair Hole and the future
Worbarrow Bay
Tyneham from Gadd Cliff
(Note the land use)
Broad Bench
Kimmeridge Bay – A wave cut platform
St. Alban’s Head
Winspit (behind)
Chapmans Pool
Waves shape the coastline.
Winspit
Day 4 – St. Albans Head to Sandbanks
Dancing Ledge
(+ tidal pool!)
Sandbanks
Studland
Old Harry
Swanage Bay
Peveril Point
Looking out to see
from Anvil Point
Durlston Head
Anvil Point
Swanage
Swanage Bay
Old Harry Rocks – A stack
Stack
Collapsed
Undercutting
means stack
will collapse
New cave
forming
Studland – Sand Dune System
3 Major dune ridges
Little Sea
Fieldwork (transects!)
Development of Studland – Blown Sands
Little Sea
Younger dunes with
Marram Grass
Actual fieldwork!
View over dune slack
with further vegetation
succession
Hmmmmmm!
Day 5 – Sandbanks to Barton on Sea and the Isle of White
Bournemouth
Sandbanks
Bournemouth
Bournemouth
Pier
Groynes
Hengistbury Head
Christchurch
Harbour
Spit
Groynes
Long Groyne
Sediment Build
Up
Hengistbury Head
Unstable Cliffs
Gullies
Groynes
Salt Marsh
Erosion
House!
Barton on Sea
Landslides
Landslip
Barton on Sea
Christchurch Bay
Evidence of lanslides
Land Use
East
Cowes
West
Cowes
River Medina
To Newport
River Medina ~ A Ria
Isle of Wight
That’s it!
Day 6 - Back to School