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Tuesday, 1 August 2017

Areal scouring on the Pembrokeshire islands



Here are two more of Paul Davies's fabulous images from the Pembs Geology Group Facebook page.  Click to enlarge-- the detail is truly impressive!

The top photo shows Skokholm and the bottom Skomer -- both off the south Pembrokeshire coast.

The pics show just how heavily scoured these island landscapes are -- there are occasional erratics, but real glacial deposits are hard to find (that having been said, they are hard to search for too, since these are nature reserves with nesting seabirds everywhere, so one is not encouraged to scrabble about on the clifftops, where till exposures might be found.........).

The last occasion on which ice passed over these islands was the Late Devensian, around 20,000 years ago, but maybe they have been scoured and abraded on three separate occasions during the Quaternary.

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