👉 Palaeohydrography is a geographical classification system that attempts to understand how climate and river systems have changed over time. It was developed by J.A. Thompson in the 1960s as part of his work on glacial cycles, but it has since been applied more broadly to many different types of landscapes. Palaeohydrography divides a landscape into several distinct periods or "palaeolages," each with its own set of characteristics and processes that have influenced the