Discussion of Georgia’s Physiographic Provinces and Igneous Rocks
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Discussion of Georgia’s Physiographic Provinces and Igneous Rocks
Historical Geology 1122: Geology of Georgia Interactive Field Trip Lab Assignment
Visit Dr. Mobasher’s interactive geology map of Georgia, which he recently built at IESA at the University of Georgia:
http://iesa-ung.maps.arcgis.com/apps/MapJournal/index.html?appid=21815909008d4fd28ab164588a800e96
For the greatest performance, please use Google Chrome. Using the map, answer the following questions.
1. Georgia is divided into four separate physiographic provinces, each with its own landforms and geographies. What are they from west to east?
2. What is the age range of the rocks in the province’s far west? What is the most common rock type in this area, and what fossils, if any, can be discovered there?
3. Because of the geological peculiarities found in this region, the following province is given a unique name. What are these structures, and how do they contribute to the region’s name? Consider what we learned about the evolution of the Southern Appalachian mountains last week. What supercontinent collided with North America at this period to start the process of mountain formation in this region?
4. Moving eastward, the rocks of this region are thought to be the oldest in the southeast United States. What kind of rocks predominate in this region? When North America collided with which plate, did this area deform?
5. This province’s rocks are commonly referred to as “the foothills,” however they are often confused with the previous province, which is it? Mafic dikes abound in this area, which are often connected with continental rifting. Describe the tectonic mechanism that resulted in the creation of these mafic dikes in this region at this time.
6. The province to the east is made up of younger, sedimentary rocks. Where did the sediments in this area come from? Give five examples of invertebrate and vertebrate fossils that have been discovered in this area.
7. Pay a visit to Stone Mountain. Stone Mountain is made up of what kind of rock? Stone Mountain is a huge exfoliation dome in the United States. Explain the weathering process that results in exfoliation joints.
8. Take a trip to the Brevard Fault Zone. What are the zone’s main structural characteristics? What exactly are boudins, and how do they come to be? This feature should be sketched and annotated.
9. Take a trip to the Cumberland Plateau. What types of rocks are found in this area? What depositional environment do they reflect and how old are they? In this portion of Georgia, limestone typically underpins the lowlands. What is the connection between this and the formation of caves in the area? At the end of the Paleozoic epoch, most brachiopods went extinct. Describe the features of brachiopods and how to tell them apart from bivalves.
10. Go to Sandersville, Georgia, to see the Kaolin Mine. Describe the geological environment and terrain shape that resulted in the formation of these massive kaolin deposits.
11. What event or events are considered to be the beginning of the Anthropocene? What are some of the positive and negative effects that people have had on the planet throughout this time? What do you believe this signifies for the planet’s future now that you have a greater knowledge of geologic time?
Discussion of Georgia’s Physiographic Provinces and Igneous Rocks
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Discussion of Georgia’s Physiographic Provinces and Igneous Rocks