CHICAGO ROCKS! Geology in the City
ESCI 109, Section 01
Daily Objectives #8 (September 24, 2009) Dr. Sanders
Diversity rocks! For each of the characteristics given in class, find another person who shares that characteristic with you. When you find them, record their name, examine the rock sample they brought in, and list a characteristic of their rock that you might put into a formal rock description.
By the end of today's class, you should be able to do the following:
w List the two main weathering processes, and for each one, give several examples of that process.
w Identify signs of each of the two main weathering processes as they affect rocks (or other materials).
w Given a new rock, describe it as completely as possible (in pairs). Then, break the rock open, describe its "fresh" (broken) surface, describe the difference between the exterior and interior, and point out any signs of chemical or physical weathering that might be apparent.
w Locate "real world" examples of the two main weathering processes, and photograph them. Write a brief (1-2 sentences) description of the evidence of weathering in each photo. Send the photos to Dr. Sanders' e-mail. Criteria: Your photos must include a body part for scale--e.g. hold your hand or foot or head next to the weathering examples. The face of every group member must appear in a photo. Your photos will be posted on the web page, so make sure they show good examples of weathering!