Stack (geology)

Surf piers are soaring in front of a cliff coast rock towers and similar formations, which are formed by surf erosion. They are formed by the collapse of surf gates or separation of surf streets.

A well-known surf pier in Germany is the Tall Anna off the island of Helgoland. Whose name on Helgoland Frisian, Nathurn Stak ( Nordhorn Surf pillar '), refers stack on the English name and the Scottish Gaelic name stac. In Scotland you will find surf pier for example, as part of the St. Kilda archipelago ( Stac an Armin, Stac Lee), where they were formed from the remains of a Tertiary volcanic cone. Smaller surf piers can be found around the Farne Islands in the North East of England, and in the Flannan Isles.