Built upon foundations that stretch back over unimaginable periods of time, the stunning landscapes present at Carsaig Arches owe their origins to the complex geology of an island that continues to attract visitors from all over the world.
The highly dramatic columnar-jointed rock faces of the imposing cliffs at Carsaig are a comparatively recent example of Mull’s geological history, being formed during a prolonged period of volcanic activity around 60 million years ago.
Successive flows of lava, over at least a 5 million year period, were extruded from fissures on to Mull’s land surface, covering an extensive area of basement rocks. Where the lava has cooled and contracted, pentagonal and hexagonal-sided columns formed, such as can be seen in the cliff scenery at Carsaig and elsewhere in south-west Mull.
The Isle of Mull hasn’t always had a cool, maritime climate and has been subject to the phenomenon of continental drift over hundreds of millions of years. This has resulted in Mull travelling northwards from a hot, dry desert latitude, through warm, tropical regions, close to the Equator, to its present location in the North Atlantic. Fine grained sands and muds, deposited in shallow seas during such times, are exposed as sedimentary rocks on the shore at Carsaig Bay and contain the fossilised remains of small marine animals.
Getting to the Arches
Muddy and rocky paths lead the walker west along the bay towards the Nun’s Cave and the famous Carsaig Arches, where a variety of wildlife may be encountered. The cliffs are home to Golden Eagle, Buzzard, Kestrel and Raven, as well as the area’s population of feral goats, a relic of a time past when these animals would have been among the first to be domesticated by man on the island. Due to the remoteness of the area and the lack of disturbance, Otters are frequently seen and inquisitive Common Seals provide amusing entertainment for the visitor.
Images courtesy of Seaview Guest House in Fionnphort