[dirtboy]

I can find instances of unconformities all over the globe. Lack of seismic activity happens in the center of cratons, but is widespread elsewhere.

Learn some geology more than gazing at a few photos of canyons, which are very limited in their spread - areas of ample rain have the visible geology covered by vegetation.

[hopespringseternal]

Again, you are asking people to believe that essentially no erosion happened in large areas for hundreds of millions of years. With ice ages happening every fifty to hundred thousand years? With climate varying on that scale and frequency imagining the stable buildup of layers is a non-sequitur, since climate is one of the primary factors in both deposition and erosion.

A couple of hundred million years is an unfathomably long time to have the stable, undisturbed buildup of a layer.