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:
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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
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From each map, extract information about the feature based on
the information illustrated in that map.
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Demonstrate that you can work with maps of different
scale , accurately correlating them with each other.
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Correlate the information you gather from each map, putting
it together to create a single interpretation of the geologic feature.
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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.)
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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.)
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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.)
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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).
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Determine what topographic quadrangles you would need to
locate a particular feature found on a street map, map of surficial geology, or
physiographic map.
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Use city boundaries to correlate the ISGS physiographic map,
city map, and topographic quadrangles.
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Use appropriate terminology to describe sediment
characteristics associated with various modes of sediment transport and
deposition.
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List several different types of sediment and explain the
processes that might transport and deposit each of them.
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Define the term weathering, distinguish between
the two main types of weathering, and give several examples of weathering
processes.
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List the appropriate terms used to describe sediment sizes,
in order from large to small (or small to large!) grain size.
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List and describe four mechanisms for transport
of sediments.
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Describe the conditions under which deposition
(as opposed to erosion and/or transportation) of sediments would occur.
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Explain the difference between "sorted" and "unsorted" (or
"poorly sorted") sediments.
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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
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Define the geologic term till.
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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. |
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Describe the meaning of the term "glacial erratic";
explain the significance of glacial erratics in northeastern Illinois
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Define the following terms and explain their importance in
Chicago-area geology:
moraine intermorainal area
sluiceway Outlet Valley
lake plain Glacial Lake Chicago
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Identify each of the features listed above on
appropriate types of maps--i.e., geologic, physiographic, and topographic maps.
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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.