Examine the geologic cross section below, and determine the relative ages of the lettered rock bodies and features such as faults or surfaces of erosion. In order to determine the relative ages use the four fundamental principles of relative age dating that were explained to you on the concepts page. Always start with the oldest rock and work toward the present. Rock body M is composed of igneous rock. All other rock layers are sedimentary.
Once you've figured out the relative ages, type your answers in the white blocks, then go to the bottom of the page and click on the button marked "Submit Answers for Correction." A box will open which will tell you the answers you missed. Click OK and it will give you the number correct, the number left blank, and the number wrong.