Physiographic province

Mid-level region in the Fenneman model of physiographic regionalization

A physiographic province is a geographic region with a characteristic geomorphology, and often specific subsurface rock type or structural elements. The continents are subdivided into various physiographic provinces, each having a specific character, relief, and environment which contributes to its distinctiveness. The physiographic provinces are then subdivided into smaller physiographic sections.

This keyword could refer to multiple things. Here are some suggestions: