Each concept here is mapped to its prerequisites — the ideas you'd need first to understand it — all the way down to four foundations: Space, Time, Energy, Pattern. Click any prerequisite to drill down, or scroll for the chain graph.
A col is a low point formed by the push or pull of erosion, shaping the landscape over time as energy interacts with the particles that make up the mountains.
External reference — all senses of the word “col” on Wiktionary. This atlas concept maps to only the slice of meaning relevant to the prerequisite graph.