A rather similar process of differentiation has led to professionalgeologists coming together nationally within one or two specific societies, whereas the amateurs have tended either to remain in local societies or tocome together nationally in a different way.

类似的分化过程也导致专业地质学家聚集起来，形成一两个全国性的团体，而业余地质学家则要么留在地方性团体中，要么以不同方式组成全国性的团体。