[dirtboy]

Let's see. Your core premise: "Millions of years of erosion and seismic activity would create massive differences in layer placement and thickness everywhere. Instead you see the opposite — layers are remarkably consistent in thickness and depth. Even your picture shows this."

And your claims about undisturbed deposition is a strawman. If you study a formation closely, you see paraconformities, or shifts in depositional environments due to either sea level change or lifting or dropping of platforms. When you step back, it looks like one uniform formation, but when you get your face right in front of the rock, you can see them clearly.

Also, erosion by its very nature leads to a flat surface. If you hike in the Wind River Range (I have), at 12,000 feet there is a level peneplain - when the Rockies were eroded to a near-level surface and later uplifted to their current elevation. So your observation about generally flat surfaces between formations is basic physics when the gradient goes away.

[hopespringseternal]

And yet the overall layer is well defined. Somehow, miraculously, all those individual layers level out at the transition.

And the lack of an ice age doesn’t help you much. The ice age is just an example of a changing climate. Water erodes and deposits as well as ice.