ar: و أحد اﻷشياء التي لاحظها أنك لو نظرت الى جبل مثل جبال "الابالتشينز" تجد أن الصخور فيها مطوية و مطوية بصورة معينة تبين أنها كانت مضغوطة من الجانب
en: And one of the things he had observed is that if you look at mountains like the Appalachians, you often find that the rocks in them are folded, and they're folded in a particular way, which suggested to him that they were actually being compressed from the side.