It would be the appropriate and comradely thing to do, since you've given me a good laugh.
You need to be corrected here. While the theory of evolution supports the estimates as to the age of these layers, such age has been determined quite independently of evolutionary theory. This was done, initially, by considering such things as sedimentation rates, nature and pace of isostatic and eustatic adjustments, probable duration of lacunae, etc. Then the more powerful tool, for absolute dates, of radiometric dating was applied. Parallel use of biostratigraphic techniques to determine relative ages still does not rely on an evolutionary model, but simply on the observed consistent sequence of fossils found in any undisturbed sequence globally. This sequence was acknowledged by Creationists and Evolutionists alike in the 19th century.
I make this correction since it reveals a persistent problem with the content of your posts. Your observations are simple to the point of being incorrect on important points such as this. This simplicity appears to be the result of parroting what you have gleaned, uncritically it seems, from Creationist literature. I also aim for simplicity, but the simplicity is deliberate in order to make my technical posts digestible by as much of the thread readership as possible. If this were a serious discussion, with individuals educated in the matter, I'd ramp up the technicalities and subtleties and complexities by several levels.
Before you mention it, I am aware that the foregoing is incidental to the point you are trying to make. However, that point is based upon a flimsy foundation of misunderstanding and misinterpretation well illustrated by this particular error.
Just as an aside, The Grand Canyon is the most astounding natural vista I have yet seen on the planet. Although not prone to using expletives. when I first glimpsed it I uttered a single expletive, repeatedly, for a full fifteen minutes, so impressed was I. (In contrast, when I first saw the pyramids at Giza I remarked, "They are smaller than I imagined".)
See, once again in the simplicity of your remarks you are revealing your ignorance of these matters. I would need to give you a couple of days worth of lectures on basic sedimentology* to start you on the right road, but in the meantime here are some (over-simplified) headlines.
- The sequences in other parts of the world do not, for the most part, follow the same sequence and in most cases they follow nothing like the same sequence.
- How do you account for the clear evidence (including animal tracks) that the Coconino sandstone was deposited by wind in a terrestrial, not marine, environment?
- Formations frequently include the name of the dominant lithology, but it is rare for that lithology to be the only one present (it may not even make up 5-% of the formation).
You will have to humour me further and spell out, in detail, why you think it is illogical.
You will have humour me further and explain why, for example, the Coconino sandstone is, in some parts of the Grand Canyon, 600' thick and in other parts only 60'.
You will have to humour me further and explain why the Coconino sandstone is covered by thousands of feet of younger sediments in the Grand Canyon, yet not many miles away, at the Barringer Meteor Crater, it is at the surface.
And, if you wish, you could humour me further and explain why Creationists seem so hung up on the Grand Canyon. I'm guessing it's because American geologists, when seeking to educate the public, keep bringing it up to illustrate their lessons, whereas in Europe we have less spectacular, but more relevant and interesting examples.
*
I am willing to give you a couple of days worth of sedimentology lectures, but would only be willing to do so if you were willing to truly commit to listening to them sincerely and devoting the necessary follow up study with an open mind. You can let me know by pm or in this thread if you are interested. Please note this would be a long term issue as I would first need to construct the lectures.