It can be demonstrated that there is a strong association between wells and the presence of river alluvial deposits, or alternately, there is a negative association between wells and Tertiary deposits. In addition, excepts to this rule can be explained in terms of the sociopolitical circumstances of landscape by the following means:

1. Exceptional accumulation of capital to individuals and household units.
2. Exceptionally low labour-cost circumstances.
3. Interference by statecraft, with much greater capacity to use articulated economic surplus.

This argument is further strengthened by the rapid development experienced in the areas of Tertiary sediments after the arrival of the railway, which opened new opportunities for sourcing of water.