1. Geysers By Alyssa Lux and Amy Pendergast

2. What are Geysers? According to Merriam- Webster a geyser is “a spring that throws forth intermittent jets of heated water and steam” There are only 1000 active (and known) geysers in the world Over ½ of them are located in Yellowstone National Park

3. How do geysers work? 1.Water is heated by magma, rises and mixes with cooler water, steam condenses before reaching the surface 2.Steam bubbles survive and temperature increases, steam concentrates at ‘R’, start of eruption

4. How do geysers work? 3. The eruption becomes large releasing the superheated water quickly. The superheated water turns into steam because of reduced pressure. 4. The eruption loses pressure and decreases. The water goes back into the chamber which cools it down. The cycle begins again.

5. Right Conditions An abundant supply of water An intense source of heat Unique plumbing –Water- and Pressure-tight –Ryholite

6. Threats to Geysers Electricity production Mineral extraction

8. Old Faithful Cone Geyser Erupts between 35 to 120 minutes Height ranges from 90 ft to 184 ft Temperature of water is 204 degrees F

9. Castle and Riverside Castle –Cone –20 min water phase and 40 min steam phase –12 ft cone is 5,000-15,000 years old Riverside –Cone –Duration- 30 min –Interval-5.5-7 hrs

10. Resources http://www.geosciences.fau.edu/Resource s/CourseWebPages/Fall2004/GLY3164/Y ellowstone_NP.pdfhttp://www.geosciences.fau.edu/Resource s/CourseWebPages/Fall2004/GLY3164/Y ellowstone_NP.pdf http://www.uweb.ucsb.edu/~glennon/geys ers/http://www.uweb.ucsb.edu/~glennon/geys ers/ http://www.geyserstudy.org/geyser_main.h tm