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.
Algo que ele tinha observado é que, se analisarmos montanhas  como os Apalaches, geralmente percebemos  que suas rochas são dobradas, e dobradas de forma peculiar, o que o levou a crer que, na verdade, elas estavam  sendo comprimidas na lateral.