how did the surtsey island form
Surtsey is an island off SW Iceland, it was formed by volcanic eruptions beginning in November of 1963 and ending in June 1967. No further eruptions are expected there.  T â¦ he volcano is a composite form, where lava has covered the existing cinder cone and formed erosion-resistant rock.urtsey is an island off SW Iceland, it was formed by volcanic eruptions beginning in November of 1963 and ending in June 1967. No further eruptions are expected there.