The SAGE Handbook of Geographical Knowledge is a critical inquiry into how Geography as a field of knowledge has been produced, re-produced, and re-imagined. It comprises three sections on Geographical Orientations, Geography’s Venues, and Critical Geographical Concepts and Controversies. The first provides an overview of the genealogy of ‘geography.' The second highlights the types of spatial settings and locations in which geographical knowledge has been produced. The third focuses on venues of primary importance in the historical geography of geographical thought.

The Cycle of Erosion: Changing Times, Changing Science

The Cycle of Erosion: Changing Times, Changing Science

The cycle of erosion: Changing times, changing science


In the 1880s, the Harvard geographer William Morris Davis (1850–1934) formulated a cycle of erosion to explain the development of landforms over time. His model received widespread, but not universal, acclamation. Cyclic concepts were common to nineteenth-century science and Davis’ model offered a seemingly logical explanation of Earth's landforms in terms of their apparent youth or maturity or old age, and their evolutionary culmination in the peneplain. The model survived well into the twentieth century and generated many followers. There were skeptics, of course, and there were alternative concepts, but not until the emergence of plate tectonics, refined dating of geologic time and improved understanding of Earth's changing climates and ...

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