41stfloor
Active Member
The water may well be old, but if so, it's stagnant, and barely moving. Water does not flow from Georgian Bay to Lake Ontario through groundwater. There is a flow divide, both in the overburden, and the bedrock.
Millions of years seems to be a bit of a stretch though. I'd be surprised if it dates to before the Illinoian stage, which only ended 130,000 years ago. Do you have a reference for this?
Also, I don't know how it would be that deep in the bedrock - surely it wouldn't be in the Precambrian?
Among other sources, check out the lost rivers link I provided above and the book I have referred to a couple of times above. The essay "High Park Waterways: Forward to the Past" by Jane Schmidt and Frank Remiz is quite instructive. You can also conduct your own internet and library research, just as I have done.
Like any old bedrock acquifer, the water is not stagnant. It is filtered after flowing for many, many years underground. The only "impurities" are excess minerals (mostly iron), not bacteria. The water does not flow from Georgian Bay, it flows from the Georgian Bay area.