Coasts Examples

Name an example of a raised beach, relic wave-cut notch, abandoned cliff & sea cave

King’s Cave, Isle of Arran

Name the raised beach in Dorset 15m above present day sea level

Isle of Portland

When was the raised beach at the Isle of Portland thought to have been formed in?

Tyrrhenian interglacial period (around 125,000 years ago)

How high is the frost-shattered limestone debris layer on top of the Isle of Portland?

1-1.5m

What does a 1 degree fall in mean global temperature result in approximately?

2m sea level fall

Name an example of a ria (submerged river valley)

Salcombe, Kingsbridge, Devon

Name an example of a fjord (submerged glacial valley)

Sogne Fjord, Norway

How long is Sogne Fjord?

(Nearly) 200km

Name an example of a shingle beach (submergent landform)

Chesil Beach tombolo

In what period did the shingle for Chesil Beach accumulate in Lyme Bay?

Wurm Glacial Period

How far was shingle carried to form Chesil Beach in the Flandrian Transgression before attaching to the Isle of Portland?

50km northeast

How far is LSD moving Chesil Beach?

17cm northeast/year

Name an example of a blowhole

Trevone, Cornwall

How deep is the blowhole at Trevone, Cornwall?

25m

Name an example of a geo

Huntsman’s Leap, Pembrokeshire

Name an example of a bar

Loe Bar, Cornwall

How deep in Huntsman’s Leap geo?

35m

Huntsman’s Leap geo was formed by erosion along a joint in what rock?

Carboniferous limestone

Name the discordant coast line Old Harry Rocks was formed at?

Isle of Purbeck

Name the concordant coastline Lulworth Cove was formed at?

Isle of Purbeck

What rock type at the Isle of Purbeck was eroded to form Lulworth Cove?

Limestone