On Rosslare Strand in Ireland, a series of groynes transects the beach to prevent loss of sediments from the shore. Most of these sea defence groynes are constructed as a row of wooden posts embedded deep in the sand. Over time, the posts have been weathered and whittled down to varying degrees, dependent on their position and exposure to wave action. Some rows still stand knee-high, festooned with seaweed and fishing lines, but others have been worn down to mere stumps. The eroding posts reveal intricate wood-grain patterns, and have sometimes become narrow and tapered with wear, thus opening up gaps in the line that become traps for wave-driven pebbles.