Pebbles from Carboniferous Period rocks at Langland Bay

The pebbles at Langland Bay are all sedimentary rock as far as I can see but they include many different rock types from shores further away. Red and green Devonian sandstones, siltstones and conglomerates; light and dark bluish-grey Lower and Upper Carboniferous Period limestones (some with fossils), and shales; Namurian sandstones, grits, shales and coal measures with black and iron-bearing deposits; and no doubt the occasional erratic brought in by the ice sheets in periods of glaciation.  Consequently there is a great variety of colours, textures and patterns. Pebbles with holes made by sea creatures such as piddocks or other boring bivalved molluscs, or by marine polychaete worms and sponges are also a frequent occurrence. The pictures show the pebbles mostly in the the positions where they were found although I may have moved the odd one or two.

6 Replies to “Pebbles at Langland Bay”

  1. I really enjoy your posts Jessica, interesting to read about the holes in stones, I had not realised before what caused this to happen.

  2. Thank you, Julie. How holes get into stones seems to be a very popular subject. I get more views on my posts in this blog on stones and shells with holes made by sea creatures than any others!

  3. I find pebbles to be endlessly comforting to look at. Your pictures are exquisite and deeply comforting to gaze upon. They are fragments of something else, smoothed by their travels, bearing bits of their source, and rubbing each other into smooth beauty.
    I love this blog!!!

  4. Thank you so much for your lovely comments about the pebble pictures. I am always attracted to pebbles and I often wonder if it is a subject that I have included too much in this blog! Your kind and generous remarks are very affirmative.

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