Tuesday 20 March 2012

Gneiss time at Point of Sleat

It was a cool and cloudy day for the group's first visit to the Point of Sleat on the southernmost tip of Sleat Peninsula in south east Skye. Most of Skye has a volcanic topography, but Sleat is an exception. I can't begin to explain the complex geology of this area properly but suffice it to say that rocks were layered, with the oldest, Lewisian gneiss, at the bottom, followed by Torridonian sandstone and shale, then Cambrian quartzite and Durness limestone. The 3 major thrust faults Moine, Tarskavaig, and Kishorn messed things about a bit, introducing the metamorphic rock Moine schist and moving gneiss from the basement to the top floor. Some igneous intrusions are thrown in for good measure. Anyhow, it's all beyond me.

Looking south east across the Sound of Sleat to the Scottish mainland.


What was this again?


Shale layered between igneous rock?



A sandstone layer?


Isle of Eigg


More stuff






Is this a layer if Cambrian quartzite or what?


Something was pushing too hard and it got bent.









Falling


Coastal cows






Volcanic plug or lava lake?












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