Stormcoast

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Eshaness SC north of the lighthouse – The line of big boulders may indicate a former tsunami event.
Cliff walker among uplifted stones and boulders at Eshaness lighthouse – solid rocks marked red, CTSD marked yellow.
Eshaness - Big boulders mark events of heavy storms of the last centuries
Stormcoast debris on Mousa

Stormcoasts, sometimes also called storm beaches, are a striking feature at a few sites on rock coasts of the British Isles but are quite common in the Northern Isles in general. The term stormcoast is the popular expression for a stretch of a cliff coast where cliff-top storm deposits (CTSD) occur. CTSD are wave-generated accumulations of stones and large boulders on the tops of cliffs. Such developments are restricted to the exposed outer coasts of Shetland where cliffs are exposed to the main wind directions: to the west on the Atlantic coast and to the south and south-east on the North Sea coast.

Mainly stones of all sizes but large boulders as well may be accumulated well above the high water mark at elevations of up to 50 metres. On active stormcoasts the debris thrown over the cliff top will be sorted depending on the size of the stones and boulders and the distance from the cliff edge respectively. Where there is a lack of sorting and frequent presence of boulders over 1 m in length such features are commonly not associated with stormcoasts but may point to affinities with tsunami deposits from the geological past of the area.

Where we have grass covered cliff tops, sharp edges cut into the top layers may indicate stormcoast activities as well.

The best places to view such features in Shetland are:

North Atlantic/North Sea Location Site National Grid Referrence
North Roe Fugla Ness HU 313914
Villians of Hamnavoe South Head HU 238824
Villians of Hamnavoe VH1 HU 239815
Villians of Hamnavoe VH2 HU 239819
Villians of Hamnavoe VH3 HU 240813
Eshaness Head of Stanshi HU 214805
Eshaness Grind of the Navir HU 213804
Eshaness Lighthouse HU 205785
Papa Stour Virda Field HU 149625
Burra Clettnadal HU 356302
Scat Ness Ness of Burgi HU 386083
Grutness Grutness HU 409103
Out Skerries Nackie Geo HU 694724
Out Skerries South Ward HU 683712
Out Skerries Mioness HU 666706
Mousa Green Head HU 463232


See also

Further Reading

Research Paper with many graphics and pictures, thus "easy" to understand.



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