quote:Perhaps Edge would be up to the task of re-outlining the difference between the textbook version of the geologic column,...
Actually, I have a text in front of me that shows 15 different geological columns for the Cambrian alone... I think what you mean here is the 'geological column as most YECs see it'. This is actually the Geological Time Scale as your first site points out quite well. There is basically one time scale. How it got filled with rocks is a different story. Every location on earth has its own geological column.
quote:... and the real world version of the geologic column.
Yes, this (these) are the real story. They represent the actual rocks occurring at a given location, in order of occurrence. They essentially fill in the time scale 'trays' with rocks. In most cases, not all periods of the time scale are represented. This is not unexpected or a violation of some geological precept.
In fact, we expect gaps, some of them quite large. This is because of erosion or non-deposition of rocks in those gaps which we generalize as 'unconformities'. We know unconformities are real, because we live on one. There have been no significant sedimentary rocks deposited on the Canadian shield (for instance) for as long as anyone can remember.
quote:I know we've had some discussion of this in the past. In short, the textbook version is a timeline, which really says nothing about rocks. This is why there is a lot of truth to the statement "The geologic column only exists in textbooks".
IF one equates the geological column with geological time scale, yes. However, that is only done by YECs as far as I know.
Not sure if this is appropriate. but I had to respond to Faith's summation post on the "We have the fossils ..." thread.
Basically, she says that she wishes only to discuss real strata that are extensive and 'flat-lying', and are the basis for the geological column. She produces two images from disparate locations not in the Grand Canyon which are examples of such strata.
Well, I wonder if she will explain the sand channel that is highly visible in the Buffalo Sandstone in the first image. It clearly pinches out almost completely to the right side of the roadcut.
In the second image, I'd like to know the formation involved because it looks like a lacustrine deposit; and lakes are usually limited in extent and form in, ... well ... low places in the topography, er ... landscape.