Exploring the British Isles... John Buchanan June 1, 2019 has been wonderful the past two weeks, with two geological highlights shown below. Columnar jointed basalt at Giant’s Causeway, northern Ireland. Fingal’s Cave, Island of Staffa. Charismatic Atlantic Puffins. Two thousand year old archaeology at St. Kilda. Gannets galore at Bass Rock in the Firth of Fourth!