[dirtboy]

One more item, since we are discussing the Grand Canyon:

http://homepage.smc.edu/grippo_alessandro/unc.html

One of the areas of greatest rock vertical exposure can be found by Grand Canyon Village, in the heart of Grand Canyon National Park, on the southern rim of the canyon. A vertical profile can be drawn and rocks can be interpreted.

This image, taken from Doyle et al. (2001) shows: A - a vertical profile of the Grand canyon section B - a stratigraphic sketch of the Units and Formations present in the area, including their name, and showing the three different kinds of Unconformities, labeled as A, D, and N C - part of the Geologic Time Scale covering the Paleozoic Era, showing the age of the rock units, or Formations

Besides being able to observe the three different kinds of unconformities, we can also notice how the section of the Grand Canyon, always described as " exceptionally continuous", presents in reality enormous time gaps. That is, the amount of time missing at every unconformity, either because of erosion or because of non-deposition, is enormous. Our record is, once again, vastly incomplete.

Notice also that the top of the Grand Canyon (the rocks that you would walk on if you were for instance at the park Visitor Center) is Middle Permian in age. That means that, at this location, we are missing the whole geologic record from the Middle Permian to the Present (which includes all of the Mesozoic and all of the Cenozoic, more than 250 million years).

[hopespringseternal]

“Missing” layers beg more questions than answers and say nothing about the rest of the column. There should be gullies and channels throughout the column. You still haven’t answered how the vast majority of the column shows no evidence of erosion. Entirely missing layers also point to something other than simple erosion at work.