G303
Geologic Mapping and Field Methods

INSTRUCTIONS FOR THIS PROJECT

The purpose of this project is to further acquaint you with the techniques used by field geologists in making a geologic map that shows contacts between rock formations and geologic structures. While there is no substitute for actually making such maps in the field, the bedrock geology of Indiana is too simple for this to be possible. Thus, this project utilizes a base map and a set of photos, samples, and field notes made by a geologist as she traversed the area. The geologist would have been making the map as she worked in the field; however, you will have to work from the contemporaneous field notes.

Here are the steps to follow in construction of a geologic map in the field:

1. Plot attitudes at indicated station locations on the base map using appropriate symbols.
2. When available, use rock samples and photos to describe and classify rock unit(s) at a given station.
3. Draw in contacts between rock units.
4. Add appropriate structural (fold and/or fault) symbols to complete the structural interpretation on the map.
5. Develop and add a map legend that identifies the rock units in their proper stratigraphic order and identifies all geologic symbols used on the map.