Geographical essays davis

Davis has described his model of geographical cycle through a graph below (fig. 16.1): The cycle of erosion begins with the upliftment of landmass. There is a rapid rate of short-period upliftment of landmass of homogeneous structure.

Structure means lithological (rock types) and structural characteristics (folding, faulting, joints etc.) of rocks. Time was not only used in temporal context by Davis but it was also used as a process itself leading to an inevitable progression of change of landforms.

Various models were developed on the basis of this reference system e.g., normal cycle of erosion, arid cycle of erosion, glacial cycle of erosion, marine cycle of erosion etc. Thus, ‘geographical cycle’ is one of the several possible models based on Davis’ reference system of landform development.

Process means the agents of denudation including both, weathering and erosion (running water in the case of geographical cycle). The basic premises of Davisian model of ‘geo­graphical cycle’ included the following as- sumptions made by Davis: