The platform known as Nyrøysa was formed between 1955 and 1958, probably by a large landslide.

It hosts 12 species of birds and important populations of Southern Fulmar
(Fulmarus glacialoides) and
Black-bellied Storm-petrel (Fregetta tropica)

http://www.birdlife.org/datazone/sites/index.html?action=SitHTMDetails.asp&sid=6044&m=0