* The bedrock is not a single, uniform layer. It consists of various rock formations, each with its own formation time. The Niagara Escarpment, where the falls are located, is primarily composed of dolostone from the Silurian period, which formed around 430 to 415 million years ago. However, there are also layers of shale and sandstone present.
* The falls are constantly eroding. The Niagara Falls are actively eroding backwards, meaning the surface bedrock at the brink of the falls is relatively young compared to the bedrock further downstream.
* The age of the bedrock at the surface is constantly changing. As the falls erode, newer layers of bedrock are exposed.
Therefore, you could say that the bedrock at the very edge of Niagara Falls is the youngest, while the bedrock further down the Niagara Gorge is older. To determine a specific age, you'd need to pinpoint a location and analyze the specific layer of rock exposed there.
