Evidence of the parallel layer pattern across a vast area with little geologic activity and then massive erosion are buttes and mesas.
Here is Monument Valley in Utah.
How did the Mittens form? The entire area must’ve at one time been a complete strata. In other words, the entire area had sedimentary layers that reached at a minimum to the top of the buttes we see. Then massive erosion occurred in the area and left the buttes.
Drive 40 miles northeast of Monument valley to Valley of the Gods.
Then drive 55 miles southeast to Red Mesa.
Then drive 60 miles south to Many Farms.
Basically, this massive area exhibit the same pattern and also experienced the same layering and erosion event. How did this happen and why?