Bay of Fundy wrack lines

Wrack lines are rows of seaweed, shells pieces, driftwood, etc. that run the length of the beach marking the place where the tide reaches its highest point. Since the tides of the Bay of Fundy differ in height every day a quick glance down the beach will often give you a glimpse past few days' tidal history.

I snapped this photo at our tidal harbour when I was out walking the dog on the weekend. There are 5 clear wrack lines there showing that the tide was higher in the first cycle (1), then slightly lower on the subsequent four cycles. One big full moon tide will scoop up all those rack lines and form a nice neat line along the beach above them all!