Water is flowing downhill now, and water flowed downhill then, Wacka. Some things don’t change. A river changes course, or becomes a lake, until a higher elevation is surmounted. Rivers tend to follow geological faults for this reason. Erosion is associated with volume and speed of water, the characteristics of the substrates underlying it, or both.
Rivers are fed via numerous sources; rainwater, snowmelt, springs, etcetera. There is a geological concept known as the “Continental Divide,” most prominently on the west coast, but there’s also an eastern one, which runs through my home state. On the east of that divide, water flows downhill, generally and inexorably to the east, with rare exception due to unique topography. On the west, westward.
Funny how that works.
So your explanation for the Grand Canyon is the Continental Divide??? The entire Colorado system is to the west of the Divide.
I don’t know what you are talking about with regards to that.
I was taking about causes of the Colorado being made vs the creationist Noah’s flood myth. The rate of erosion is greater than the rate of the uplift of the land, roughly keeping the river flowing at about the same altitude it’s always been. The land got higher.
Same thing is happening near my house on a smaller scale. Again, this Creek drains the entire area near my house. No other canyons on this side of the bay are deeper or steeper. How else did the area manage to drain? The water didn’t run uphill. Give me another plausible mechanism that fits the facts.