The breccia embedded in the upper horizontal section is proof itself that it did not form millions of years after the lower vertical strata. There had to be some kind of friction to break it off and embed it.
I don't understand your logic here. Maybe you don't know what breccia is? I can't imagine that to be the case though...
Anyway, a breccia is composed of angular clasts cemented in a matrix. For example, a sedimentary breccia would be fragments of sedimentary rock cemented together with additional sedimentary deposits. These materials can have completely different sources, ie. compositions. This would imply that first sediments need to be deposited, then lithified, then broken into clasts, then more sediment deposited between the clasts, and then the entire structure lithified.
all the strata were in place horizontally, and still damp and malleable from the Flood, when tectonic force pushed the lower segment upright, abrading the vertical rocks at the point where the different kinds of rock met, that being the point of least resistance, so that the whole formation was divided between the two kinds of rock.
How do "damp and malleable" formations fracture into angular clasts? And how are they then cemented into a breccia?
Whoever calls me ignorant shares my own opinion. Sorrowfully and tacitly I recognize my ignorance, when I consider how much I lack of what my mind in its craving for knowledge is sighing for... I console myself with the consideration that this belongs to our common nature. - Francesco Petrarca
"Nothing is easier than to persuade people who want to be persuaded and already believe." - another Petrarca gem.
Ignorance is a most formidable opponent rivaled only by arrogance; but when the two join forces, one is all but invincible.