Typical pseudo-science: refer to everything in terms of massive numbers (hundreds of thousands to billions) of years and even being off by millions means nothing. Sounds like the same "science" that swore we'd found a new human-like "hobbit" species just a few years ago. haha
Pass some of that popcorn over here . . . this b.s. science discussion should be interesting.
You are confusing the age of the canyon with the age of the rocks in the canyon, probably on purpose.
When it was carved has nothing to do with the age of the earth or the age of the rocks.
It's like revising the estimated time period when the glaciers carved Yosemite Park.
If you don't understand science, just eat the popcorn but refrain from calling the scientists "dolts."