Map #1: Geologic Map (Overhead) of Georgia and Alabama

Map #1: Geologic Map (overhead) of Georgia and Alabama

Map #2: cross-section of Georgia and Alabama Geologic Maps and Cross Sections

1. Read the legend. What kinds of sedimentary rocks are shown in the maps?

2. What environment do you think was present during the deposition of the rocks in this area?

3. Compare the thickness (vertical extent) on the cross-section (Map #2) to the distance covered (lateral extent) on the overview (Map #1).

4. Sedimentary rocks are originally deposited in flat, horizontal layers. Given this fact, why do you think that some of the layers in the cross-section are tilted?

5. On the cross-section, follow the units named Eutaw and Tuscaloosa (green layers). Are the units continuous? Why or why not?

6. What kinds of igneous rocks are shown on the maps? 7. Are the igneous rocks intrusive or extrusive? How do you know?

8. Compare map #1 and map #2. Are the igneous rocks you see in the cross-section visible on the map? Why or why not?

9. Compare the rock units labeled Pinckneyville Granite, Paleozoic Granite and Jurassic-Triassic Intrusives. How do their sizes vary?

10. Look at the Paleozoic Granite, and the Jurassic-Triassic Instrusives. How are they different? How are they similar? How do they differ from the Pinckneyville Granite?

11. What kinds of metamorphic rocks are shown in the maps?

12. How does the placement of the metamorphic rocks compare with the surrounding rock units?