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What do Geologists do? ! 800px_COLOURBOX8257861 - Coggle Diagram
What do Geologists do? ! 
Economic Geologists: explore for and help produce metallic and non-metallic rock and mineral resources of economic value.
Engineering Geologists: investigate the engineering properties of rock, sediment and soil below man-made structures such as roads, bridges, high-rise buildings, dams, airports, etc.
Environmental Geologists: study the environmental affects of pollution and recommend solutions to environmental problems like predicting and mitigating the effects of natural hazards etc.
Geochemists: investigate the chemical composition and properties of earth materials, and other resources of economic value.
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Geophysicists: use the principles of physics to investigate the structure of the Earth's deep interior, explore for economic resources in the subsurface, and monitor pollution in ground water.
Glacial or Quaternary Geologists: study the history of geologically recent (Quaternary period) glaciers as well as the sediment deposits and landforms they produced.
**Marine Geologists: study the physical, chemical and biological characteristics of the sediments deposited on the ocean floors and the rocks that underlie them.**
Hydrologists: are concerned with water on the Earth's surface, including its precipitation, evaporation and runoff, and its abundance and quality in streams and lakes.
Mineralogists: investigate the origins, properties and uses of the minerals occurring within the Earth's rocks.
Paleontologists: study the remains of ancient animals and plants (fossils) in order to understand their behaviors, environmental circumstances, and evolutionary history.
Petroleum Geologists: explore for and help produce petroleum and natural gas from sedimentary rocks.
Petrologists: study the origins and characteristics of igneous, metamorphic and sedimentary rocks.
Sedimentologists: investigate the origins and characteristics of sediment deposits and the sedimentary rocks that form from them.
Stratigraphers: investigate the time and space relationships among sedimentary and other rocks on local to global scales, and are also interested in the geochronology (absolute dating by radiometric methods) and fossil content of rock layers.
Seismologists: are geophysicists who study earthquakes, both to better understand the physical processes involved and to interpret the deep internal structure of the Earth.
Structural Geologists: study the folding, fracturing, faulting and other forms of deformation experienced by rocks below the Earth's surface, and are also interested in how these processes relate to global Plate Tectonics.
Volcanologists: investigate volcanoes, especially their eruptions and deposits, in order to better understand physical processes involved and to predict volcanic eruptions.