CHICAGO ROCKS!  Geology in the City
ESCI 109
Spring 2010

Review for Exam #2 (March 31, 2010)                                                                                          J. Hemzacek and L. Sanders

For the exam, you should be able to do the following:

w Locate a given feature on each of these different maps  (for example, we did this for the "worm" or "slug" feature in class):

           - street map     - topographic map    - map of surficial geology   - physiographic map  

w From each map, extract information about the feature based on the information illustrated in that map.

w Demonstrate that you can work with maps of different scale , accurately correlating them with each other.

w Correlate the information you gather from each map, putting it together to create a single interpretation of the geologic feature.

w Using the "Index to Topographic Maps", determine the precise location of a topographic map on the geologic map.  (For example, in class, we worked with the Berwyn and Blue Island topo quadrangles.)

w Using the key to the geologic map, identify the geologic formations that occur in a specific area.  (For example, in class, we counted 7-8 geologic formations, plus two special symbols, that occur within the area covered by the Blue Island topo quadrangle.)

w Using a topographic quadrangle and geologic map together, determine where on the topo map a specific geologic deposit can be found.  (The example we did in class involved locating where the Parkland Sand deposit could be found in the Blue Island topo quadrangle.)  

w Sketch topographic profiles of a feature on a topographic map: (for example, we did this for the Blue Island quadrangle, in both the east-west, and north-south directions).

w Determine what topographic quadrangles you would need to locate a particular feature found on a street map, map of surficial geology, or physiographic map.

w Use city boundaries to correlate the ISGS physiographic map, city map, and topographic quadrangles.

w  Use appropriate terminology to describe sediment characteristics associated with various modes of sediment transport and deposition. 

w  List several different types of sediment and explain the processes that might transport and deposit each of them.

w Define the term weathering, distinguish between the two main types of weathering, and give several examples of weathering processes.

w List the appropriate terms used to describe sediment sizes, in order from large to small (or small to large!) grain size.  

w List and describe four mechanisms for transport of sediments.

w Describe the conditions under which deposition (as opposed to erosion and/or transportation) of sediments would occur.

w Explain the difference between "sorted" and "unsorted" (or "poorly sorted") sediments.

w Describe transport and deposition processes that might lead to the following deposits of sediment, and explain your reasoning: 
              - well-sorted sand                   
              - sorted sand and gravel    
              - unsorted (or poorly sorted) sediment

w Define the geologic term till.

w Explain the significance of the "puzzle" exercise that we did in class (using the topographic index map worksheet), including doing the following:

  - use appropriate terminology to describe the shape of the landform found when all the "puzzle" pieces were put together

-correlate the landform found with features found on the geologic map and the physiographic map

-interpret the significance of the landform and the material of which it is made

-relate the shape to the direction of glacial advance.

w Describe glacial processes, including doing the following:

   - describe the conditions under which glaciers will advance, retreat/ recede, and remain "stagnant" (with respect to the glacier front)

 - use appropriate terminology to describe the various mechanisms by which glaciers erode the land; explain what each term means in terms of how erosion occurs; be able to distinguish the conditions under which mechanism will operate (i.e., advancing, retreating, "stagnant")

- describe the mechanism(s) by which glaciers transport material, and under what conditions (when) glaciers transport material in different ways

- describe the mechanism(s) by which glaciers deposit Earth material, and under what conditions deposition occurs.

w Describe the meaning of the term "glacial erratic"; explain the significance of glacial erratics in northeastern Illinois

w Define the following terms and explain their importance in Chicago-area geology: 

                   moraine         intermorainal area        sluiceway        Outlet Valley       lake plain        Glacial Lake Chicago
w Identify each of the features listed above on appropriate types of maps--i.e., geologic, physiographic, and topographic maps.   

w Describe the use of geologic resources and identify several items of geologic interest on the NEIU campus.

w Name the three main types of rocks, and describe the characteristics you would use to identify them, when they are used as resources.

w Describe several geologic resources found in northeastern Illinois, and for each, give examples of how it would be used.
Department of Earth Science | Northeastern Illinois University

Copyright 2010 Laura L. Sanders.  Last updated March 28, 2010.