Presentation on theme: "What do geologists do? In school: Learn how the Earth works—processes On the job: Use knowledge about Earth processes to produce something of value: Knowledge=$"— Presentation transcript:
What do geologists do? In school: Learn how the Earth works—processes On the job: Use knowledge about Earth processes to produce something of value: Knowledge=$
Major Career Options 1. Discovering and protecting resources 2. Identifying and avoiding natural hazards 3. Researching natural processes
Resources Energy to run everything –Oil, Gas, Coal, Steam, Hydroelectric, Uranium Materials to make almost everything –Metals, Oil (plastics, chemicals), – Construction, gems, chemicals Water for food, industry, agriculture
Energy How to find oil, gas, coal? Shell Oil, Mars Platform in Gulf of Mexico (130 miles from New Orleans). 2940 ft of water. $1.2 billion Spindletop, Beaumont, TX, 1901
Finding Resources 1.Understand how they are formed—processes. 2.Predict where those processes should occur now or in the past. 3.Identify likely locations. 4.Test your ideas. Are you right?
What happens? Rain fall increases water content and pore pressure. More rain = worse Soil weakens and slips. Clay soils = worse Ground shaking = worse Toe Scarp Movement from few inches to ½ mile or more
Risk of Landslide = Rock types + water Understand the geology, estimate the risk
The next eruption? Volcano hazards and the geologist
Tsunami Where, when, how big will the wave be? Learn to recognize recent tsunami deposits, then identify ancient deposits. Evaluate future risk from past events. Sampling site of July 17, 1998 tsunami in Papua New Guinea. Mapping tsunami deposits Recent tsunami deposit in Papua New Guinea
Evidence for a Big Tsunami in Pacific Northwest Figure 5: Mud rip-up clast in tsunami sand. A 2-cm gray colored mud rip- up clast is visible in the upper left corner of this photo. Tsunami sand deposit from Washington coast. Buried soil age dated to 1700 Ghost forest in coastal Washington. Tree rings indicate they all died in 1700 from sudden subsidence and sand inundation=tsunami
Research Advance understanding about Earth processes –Improve efforts to locate resources, reduce risks from hazards –Answer other questions…
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