Looking east along the south shore of Snaefellsness to Snaefelljokull, a glacier-clad peak in west Iceland. The peninsula, Snaefellsness, is an anomalous area of recent volcanic activity away from the main rift systems (the mid-ocean ridge). The basalts erupted on Snaefellsness are distinct from those in the main rifts, in that they are more alkaline in composition.