Rocks on a Loch Gruinart beach at Ardnave, Isle of Islay

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Picture of interestingly shaped rocks on a beach next to a sea loch
Rocks on a Loch Gruinart beach at Ardnave, Isle of Islay

No idea what kind of rocks these are, but I found them quite interesting, some nice shapes and waves in them. Found on a beach on the west side of Loch Gruinart at Ardnave. Mala Bholsa visible in the distance in the centre, one of the Paps of Jura towards the right.