How in the world do rocks fold and bend
Only when they are still wet. Hard rock with millions of years between layers will fracture and break (and definitely not fold) and there is no mechanism to reheat rock layers and contort them.
Here is a picture of the BC, Canada near the Sullivan River:
Major Mountain Ranges. How did mountain ranges form? Major mountains are often crumpled like an accordion. [See Figure 49.] Satellite photos of mountain ranges show that some resemble throw rugs that have been pushed against walls. But what force could push a long, thick slab of rock and cause it to buckle and sometimes fold back on itself? Besides, any force large enough to overcome the gigantic frictional locking at the base of the slab, would crush the end being pushed before movement could even begin. Therefore, a mountain would not form. [See “Can Overthrusts Occur? Can Mountains Buckle?” on page 566.]
We can see, especially in mountains and road cuts, thinly layered rocks folded like doubled-over phone books. Other “bent” rocks are small enough to hold in one’s hand. The tiny, crystalline grains in those folds are not stretched. So, how could brittle rock, showing little evidence of heating or cracking, fold? Rocks are strong in compression but weak in tension, so their stretched outer surfaces should have easily fractured. Bent sedimentary rocks, found worldwide, often look as if they had the consistency of putty when they were compressed. They must have been squeezed and folded soon after the sediments were laid down, but before they hardened chemically. What squeezed and folded them?