of Earth Science |Northeastern
Daily Objectives #20 (November
By the end of today's class, you
be able to do the following:
v Describe the differences between
unconfined and confined aquifers, and given subsurface data, delineate
v Explain the meanings of the terms
table and potentiometric surface, and
tell in what situations they mean the same thing, and when they mean
v Describe the difference between stratigraphic
units and hydrostratigraphic
units, and sketch an example.
geologic and hydrogeologic conditions can give rise to a
no-flow boundary? constant head
v Use published maps to investigate geologic conditions in
this area: Dupage County, area bordered on the east by Salt
Creek, on the south by Spring Brook, and on the west by Meacham
Creek. (This is in the approximate area of Itasca.) Use the
following resources, plus any others you can find:
p 7.5 minute topographic quadrangles [Note:
Identify the area by County, Township, Range, and Sections, and tell
what topo quads cover it.]
p Summary of the Geology of the Chicago Area,
by H.B. Willman (1971)
p Quaternary Deposits of Illinois, by
Jerry Lineback and others (1979) [This map is hanging in the classroom.]
p Geologic Map of Illinois, by H.B.
Willman and others (1967) [This map is hanging in the classroom.]
p Stack-Unit Mapping of Geologic Materials
in Illinois to a Depth of 15 Meters, by Richard C. Berg and John
P. Kempton (1988)
p Glacial Drift in Illinois: Thickness and
Character, by Kemal Piskin and Robert E. Bergstrom (1975)
p Buried Bedrock Surface of Illinois,
by Beverly Herzong and others (1994). [Compare this to the
p Potential for Contamination of Shallow
Aquifers in Illinois, by Richard Berg and others, 1984.
Take notes! By the end of this investigation, you should be able
to write a description of the geology of the area.
of Earth Science | Northeastern
© 2005 Laura L.
Last updated November 14, 2005.