The tidal mark on the cliff face of Cataract Gorge has changed

The tidal mark left by the South Esk River has s a stripe now that wasn't 
there in March this year.
I wonder if the flood in June has something to do with it?

The moon is writing a different language.



Cataract Gorge, South Esk River. August 2016



Cataract Gorge, South Esk River. March 2016