Ridges, Cols and Gaps

Narrow high ground between valleys and the low points that cross it, including interfluves, cols, gaps and passes and ridges left by exhumed river channels. A landform belongs here when its cited article describes high ground between two valleys or a low point on a ridge. It excludes flat-topped mesas and wind-cut forms. Gaps and cols give routes through mountain ranges, and interfluves mark the divides where rain drains to different streams.