How to add spoiler tags, edit posts, add images etc. How to - a user's guide to the new version of Boards
Mods please check the Moderators Group for an important update on Mod tools. If you do not have access to the group, please PM Niamh. Thanks!

Mudstone / claystone?


  • A variety of sandstone I would think. This particular stone is commonly seen eroding out of coastal dune landscapes along the Irish Eastern seaboard, especially around the North Wexford beaches.

  • It looks like a calcite-cemented sandstone, usually formed in shallow marine environments where calcite formation is usually in-situ owing to a lack of viable transport mechanisms for significant amounts of dissolved calcium carbonate. Within these sandstones calcite cement is usually biogenic carbonate, which is generally interpreted as the dominant source of calcite cement within these sandstone environments. The small holes are worm burrows of some kind, but I can't see the ichnofacies so it's hard to say which worms (also I'm not much of a palaeontologist).