CHICAGO ROCKS! Geology in the City
Daily Objectives #26 (April 15, 2010)
J. Hemzacek and L. Sanders
By the end of today's class, you should be able to do the following:
w Tell what geologic materials are found on the Chicago Lake Plain, and explain how they were formed.
w Describe the geologic and topographic features of the Zion Beach-Ridge Plain, and tell how it was formed.
w Explain where the sand on a beach comes from.
w Describe, using diagrams, the process of longshore drift (also called littoral transport).
w Explain how human-made structures such as groins, jetties, piers, and breakwaters affect the process of longshore drift.
w Describe the topography of a ravine.
w For the following characteristics, compare and contrast the two kinds of streams found in "morainal country" (those that flow down the sides of the moraines, and those that flow through the intermorainal areas):
|4general direction of flow with respect to the moraine||4overall stream length|
|4"steepness" of the stream||4flow velocity|
|4amount of flow (e.g. big stream, little stream)|
Department of Earth Science | Northeastern Illinois University
Copyright 2010 Laura L. Sanders. Last updated April 18, 2010.