So lets just say the earth is 40 million years old.
Okay 40,000,000 X 3 feet per year (rate Niagra has cut, per year, away from the canyon rim)
Which equals 120 million feet, divided by 5280 feet per mile, equals 22,727 miles.
Right now there is a 7 miles gorge cut into the earth/canyon rim, so where's the 23,000 mile long gorge?
There is no gorge even 2,300 miles long there or anywhere else in the world for that matter.
There is a definite starting point at which Niagra has cut into the outer canyon rim...
From that starting point, to the present position of Niagra Falls, only 7 miles of earth have been removed.. The falls have cut a 7 mile long gorge into the earth.
Let me guess some of you are thinking that these great rivers change their courses every 10,000 years or so due to great upheavals of earth, because of eartchquakes volcanos, etc...
Or these great rivers have frozen over every 10,000 years or so. If that were true then there would still be a great gorge cut out of the earth each time the earth came out of these fictional ice ages and then entered back into them again..
An oscillating ice age theory doesn't hold water here.
Show me the flaws in this theory....
Even if there were proof of an oscillating ice age it still would not account for the short 7 mile gorge cut into the canyon rim, unless that area of the world was frozen over from the beginning of the earth's creation, then suddenly decided to unthaw, just 12,500 years ago, there being no flow before then. Also there is no proof Niagra has ever changed it's course and even if it did there would be more gorges cut into the earth. Lets see that would be what 20 gorges divided by 20,000 miles so even if the river had changed it's course 20 times over millions of years there would still have to be at least a 1,000 mile gorge cut into the earth from any number of points along the canyon rim..
Niagra has existed only 12,500 years, according to this site,
Niagra Parks, and so has the earth existed just beyond that.
I need to get an aerial view of this 7 mile gorge Niagra has cut into the earth to better illustrate my point...