randman writes:
I think you are making a stretch on the rock bending angle. It's pretty clear that reading this is in context, there is no contradiction. He is saying sedimentary rocks don't bend. The bend has to occur prior to their hardening into rock.
We have plenty of evidence that folded sedimentary rocks were deformend after lithification. Sedimentary textures such as grading, ripple marks, mudcracks, etc. can be used to identify stratigraphic-up direction. I'd like to see the process that can simultaneously deposit a graded bed AND deform the unconsolidated layers into recumbent folds.
Nevermind the fact that gneiss is not a sedimentary rock. The
protolith may have been sedimentary, but the gneiss itself is not the result of sedimentary processes.