PRACTICAL 1: TOPOGRAPHIC CONTOURS, STRUCTURAL CONTOURS AND GEOLOGICAL MAPS.

The red form lines in the block diagrams below represent the intersection between a geological surface with the topography surface. For a given topography surface the shape of the form line depends on the orientation in space of the geological surface. In the following graphs, the geological surfaces are planar, they have the same strike but different dips. To explore further how the topography affects geological form line visit the following website: http://visible-geology.appspot.com/

Plane dipping 75º

Plane dipping 15º

Plane dipping 45º