But my ever-adventurous wife, knowing how I like a bit of adventure and a good photograph, suggested that we climb down to see the main waterfall. We had to backtrack down the trail to where the slope was less steep, and wind our way across-slope to do it safely, but we did. And when we got there, this is the main waterfall.
You can see very clearly here how it's split between the upper limestone layers, the Manitoulin Formation, and the lower blue shales, known as the Queenston Shale. It has eroded into the extremely steep (and totally saturated at the moment) slope on the right of the picture above. Because these geological formations continue up and down the Niagara Escarpment, this basic form of waterfall can be found repeatedly.
Here's the upper falls that we started with, but shot from down below. These boulders would not have so much moss on them if the water continued at this level over the summer. And just for interest, below is my shot of the falls in winter from a couple of years ago. Hope you enjoy visiting waterfalls with me.