Sturtian glaciation

glacial Snowball Earth event ~700 Ma ago

The Garvellachs (Scottish Gaelic: Na Garbh Eileacha) or Isles of the Sea form a small archipelago in the Inner Hebrides of Scotland. The islands include Garbh Eileach, Dùn Chonnuill and Eileach an Naoimh. Part of the Argyll and Bute council area, they lie in Firth of Lorne west of Lunga and northwest of Scarba and have been uninhabited since the 19th century.