Have you ever seen the upper surface of the Navajo Sandstone? It's the kind of thing that's a bit difficult to find on the internet unless you know the name of a place where you can look at it, and I do.
It's in Arches National Park, I was just there looking at it a couple of weeks ago.
WOW, you can see the dunes and the interdune areas on the top of it. I have better pictures than this but my wife has my camera in Denver at the moment. All the white sandstone from the forefront is Navajo.
Edge, It might be noted that there are alluvial fans all over the arid and semi-arid SW US. There are mountains in the Eastern US from Georgia to New Hampshire. I've been all through them and there are no alluvial fans. To much rainfall and therefore vegetation to get the kind of rapid sediment influx you need to make an alluvial fan.
Thing that struck me about your Cutler X-section is it is very similar to the X-section from west of Denver to Eastern Colorado. The Fountain Formation is also alluvial fans coming off the eastern flank of the Ancestral Rockies. You probably know this as Garden of the Gods, Red Rocks Park and the Boulder Flatirons.
At Red Rocks Park the Fountain is 1500 feet of massive sandstone and conglomerate, but just 5 or 6 miles to the north where I70 crosses it it is only a few hundred feet of red-brown mudstone with thin SS stringers. At I70 it is and interfan area which little deposition. So much for formations being flat and of uniform thickness.
The Fountain can be traced for well over 150 miles and it changes like that along its entire exposure.
My Stratigraphic Atlas of North and Central America by Shell Oil has an excellent X-section of this and I'll try to get it scanned and posted. I have a guest from Australia showing up shortly so maybe later tonight or tomorrow.
BTW since Faith's ideas about the GU are mechanically impossible I found it amazing anyone would waste their time on it. You are dealing with someone who doesn't know how to solve a simple vector problem in high school physics and probably can't do 9 grade algebra.
Everyone go and look at the X-section of the Cutler which Edge posted.
Now imagine what an X-section perpendicular to it would look like if it was right along the mountain front in the fan deposits. It would look like the sand and conglomerate for the fans were thick and nearly continuous and the same thickness.
A picture or a X-section are a 2D representation of a 3D object this can lead to all kinds of problems including you're thinking you know what the rocks are doing when what's actually happening is completely different.
The solution to this is to make fence diagrams which are a whole series of intersecting X-sections. This allows you to see what is actually happening in 3D. Google "fence diagram images" to see exactly what I'm talking about.
P.S. Faith's arguments remind me of the movie "The Wrath of Khan" where Spock tells Kirk that Khan shows a preponderance of 2D thinking. Kirk moves vertically....checkmate!