In plate tectonic theory, we knew that if you had plates collide, it made sense: they would crush into one another, you would thicken the crust, you'd uplift it.
プレートテクトニクスでは、プレートが衝突していれば 理屈に合う　お互いにぶつかり合い 外殻が厚くなり、盛り上がる