This week's pocket pebble is a pleasingly smooth and circular Septarian Nodule. Septarian Nodules are fossilized mud bubbles - this one has been eroded out of the shale layers that make up the Cliffs of Moher. County Clare, Ireland.
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Also at a loss as to what kind of rock I'm looking at here - very pretty but completely out of place on a limestone shore. All ideas welcome.
@drsadhbh @kerry_geo @burrengeopark
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