- Environmental Geology is the fastest growing field in geology. Environmental geologists study threats to the environment and develop solutions to environmental problems. Topics include flooding, pollution, urban and sustainable development, and natural hazards.
- Hydrogeology is one of the largest branches of geology. Hydrogeologists study how water moves through streams and rocks. Quite often hydrogeologists seek to increase water availability and minimize the spread of pollutants.
- Petroleum Geology is a large and lucrative field. Petroleum geologists identify oil and gas reserves, and they are deeply involved in the study of sediment deposition in oceans, folding and faulting of rocks, and Earth history. This field ties together all aspects of geology.
- Marine Geology is a fascinating field. Marine geologists study interactions between geology, marine biology, and oceanography. Imagine a career where you spend time on beaches, boats, and submersibles.
- Planetary Geology is a growing field that focuses on such topics as meteor craters, volcanism on other worlds, possible life in icy moons of Jupiter and Saturn, and planet and moon histories.
- Economic Geology is a large and lucrative field. Economic geologists seek profitable deposits of minerals and rocks, and determine how best to mine them. Economic geologists perform investigations that involve many aspects of geology and they work all around the world.
- Engineering Geology is another large and lucrative field. Engineering geologists examine the factors that influence man-made structures and certain hazards such as landslides. Engineering geologists may pave the way for construction of highways, dams, buildings, just about anything else you can think of.
- Paleoclimatology and Paleoceanography are two of the most important branches of geology because they provide insight into how the Earth might respond to Global Warming. We can prepare for the future and lessen the effects of Global Warming if we can understand how the Earth's climate and oceans have behaved through time.
- Geomorphology is dedicated to the processes that sculpt the Earth's surface. Geomorphologists seek to understand how streams, landslides, glaciers, and wind sculpt the Earth's surface. They work in such diverse places as the Himalayan Mountains, Antarctica, and tropical jungles of South America.
- There are many other branches of geology, which focus on such diverse topics as caves, fossils, volcanoes, glaciers, earthquakes, geophysics, rock and water chemistries, and minerals!
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