Following yesterday’s long day out on Quinag, wet weather set in and motivation was lacking amongst our group. The Inchnadamph caves were an option, as was a trip to Ullapool but with a thirst for education we went to the Knockan Crag visitor centre in the North West Highlands Geopark.
The Highland Controversy was as a result of some radical geological thinking. There is a geological feature now known as the Moine Thrust which has a layer of rock lying on top of another, a common occurrence, but as layers are often set down as a result of sedimentation, younger rocks lie on top of older rocks. But at the Moine Thrust the reverse is true with the upper layer being 500 million years older ! Some geologists questioned whether this was actually the case here but these doubters were eventually overcome with the ultimate outcome being the proof of plate tectonic theory.
|rock layers showing the Moine Thrust|
Geologists Ben Peach and John Horne worked out that the older rocks had been forced over the younger rocks, an American plate had pushed itself over a European plate. Although controversial at the time, Peach’s and Horne’s resultant paper has come to be regarded as a classic geological text and the discovery is held by some as important as Darwin’s theory of evolution.
|Peach and Horne|
Knockan Crag has some trails which are easily followed with a number of sculptures and points of particular geological interest. I would recommend a visit whatever the weather but a wet day in Scotland can be made quite a bit more interesting.
|"Globe" by Joe Smith|