Structural Geology and Mapping, lab final preparation guide

 

The lab final will consist of 7 maps in order of increasing conceptual complexity.  You will be asked specific questions about each map and asked to do specific tasks.  There will be around 20 questions and tasks.  These questions and tasks address the skills and techniques learned in lab, most of which you will be asked to do only once on the test.  Needless to say, you will need to be sufficiently proficient at these tasks to do them quickly and accurately.  Bring book and notes.

 

Be able to read a topographic map well enough to fill in elevation labels, interpret downhill direction, identify valleys, etc.

 

Be able to determine the directions of strike and dip of rock layers given topographic lines and outcrop patterns (in some cases, you may want to construct structure contours).

 

Be able to complete a geological map that is partially completed for you based on map patterns or structure contours.

 

Be able to draw structure contours for a surface, given topographic lines and the outcrop pattern for the surface.

 

Be able to draw strike and dip symbols properly (given map patterns or given structure contours, for single dipping layers or for folded layers.)

 

Be able to calculate the angle of dip of layers given map patterns or structure contours.

 

Be able to determine vertical thickness of a layer.

 

Be able to calculate true thickness of a layer.

 

Given true dip, be able to determine the apparent dip along a cross-section line that is not parallel to the direction of dip.

 

Be able to draw cross sectional views given map patterns, including dipping layers, angular unconformities, folded layers, and faulted layers.

 

Be able to draw axial traces, dip directions, and determine plunge directions for folds, given a map pattern. 

 

Be able to draw structure contours and outcrop patterns, given topographic lines and the locations of three outcrops (three point problems).

 

Be able to draw isopach lines, or determine from which regions a particular layer has been eroded, or in which regions a particular layer lies beneath a designated depth of overburden.

 

Be able to infer, from map patterns, whether a fault is normal or reverse, and to visualize the fault and rock layers in various cross-sectional views.