Grooves in rocks leading from the beach out to the sea. Flinders Victoria. The romantic in me wants them to have been made by glacial activity, but I don't seriously think that's the cause. They don't appear to be manmade and they're not regular - at the widest about maybe 30 - 40 cm, but only about 20cm or so through the rocks in shadow toward the top of the photo.

There are fantastic rock pools right through this area, lots of seaweed washed up on shore and great surf for those hardy souls not worried about sharks (there's a seal colony not far away) or being swept over the rocks.
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