I think we approached the evening of Saturday 27th May with some concern, the hot weather earlier in the week had turned to heavy thunder storms, and our walk accross to the scar at Sandylands looked rather questionable! In the event the weather abated, and the rain only appeared on our walk back, allowing us to enjoy a rather interesting and historic marine landscape.
Scars (or skears) are a common geological formation in the Bay, periodically adding a bit of texture in the form of glacial boulder-clay deposites to flat mud and sands. Off Sandylands this feature has clearly been of historic importance, given the number of posts indicating fish traps. Apparently these had been in use until the early 1960’s, and while they looked like conventional fish traps, (a ‘V’ shape narrowing to trap the fish in its point as the tide goes out), anecdotally they may have been associated more with mussel farming. Indeed the reef is in part covered by a large mound of mussel shells. Interspersed in the mussel shells were oyster shells – our local species of oyster was wiped out by disease a hundred years ago, and these worn shells my have been relicts of the time when they were still plentiful.
Many of the boulders in the scar were completely covered in barnacles, or the swirling patterns of the honeycombe worm reefs. Other animals of interest included anemones, sandhoppers, a grey nudibranch, and tiny common and hermit crabs, that have recently settled to the bottom from their planktonic larval stages.
All in all, an excellent and educational experience. Many thanks to Gordon for organising this, and making an appearance despite having raced in the thunderstorms earlier in the day!