# Resource Page

 Activity 2 Slip Slidin' Away These two lessons make a connection between geology and mathematics. Use the maps and graphs provided to answer the following questions. There are two ways to approach the mathematics. Consult a mathematics teacher in your school if needed. The solutions presented here were determined using the linear regression capabilities on a graphing calculator. Your solutions may differ slightly and keep in mind these will be averages over millions of years. Plate velocities fluctuate throughout time, so these solutions may not reflect current estimates of plate motion.

Snake River Plain Worksheet

1.
Examples of graphs for Method 1.

2. Calculations

3. Movement of the North American plate in inches per year.

4. southwest

5. Using East SRP only: movement in inches = 684,000 (M1) to 900,000 (M2) (depends on method) movement in miles = 10.8 (M1) to 14.2 (M2)

6. Using East SRP only: movement in inches = 114 (M1) to 150 (M2) (depends on method) movement in feet = 9.5 (M1) to 12.5 (M2)

7. Direction and rate of the North American plate movement.

Hawaiian Island-Emperor Seamount Worksheet

1. Examples of graphs for Method 1.

2. Calculations

 3. Movement of the Pacific plate in inches per year. 4. Northeast 5. Using Hawaiian Is. only: movement in inches = 14,280,000 (M1) to 5,168,000 (M2) (depends on method) movement in miles = 225 (M1) to 81.6 (M2) 6. Using Hawaiian Is. only: movement in inches = 1050 (M1) to 380 (M2) (depends on method) movement in feet = 87.5 (M1) to 31.7 (M2) 7. Direction and rate of the Pacific plate movement Note: A straight average over the whole chain gives 3.8 per year over 70 million years. In #1, 10.5 is actually a little high and 3.8 is low. The true velocity lies somewhere in between. The true mileage in #5 lies somewhere between 81 and 225 miles. Prediction equations are just that, a prediction, and are not considered to be absolutely accurate. Much depends on the accuracy of the measurement using the scale. The SRP solutions appear to be more consistent than the HIES solutions.

 Sources Used Alt, D.D., Hyndman, D.W., 1995, Northwest Exposures: A Geologic Story of the Northwest: Mountain press Publishing Company, Missoula, MT. Arrington, Leonard J., 1994, History of Idaho: University of Idaho Press, Moscow, ID. Craters of the Moon: A Guide to Craters of the Moon National Monument Idaho, 1991, Official National Park Handbook #139: Division of Publications, National Park Service, U.S. Department of the Interior, Washington D.C. Craters of the Moon: Official Map and Guide, National Monument Idaho, 1999, National Park Service, U.S. Department of the Interior, Washington D.C. Exploring the Moon: A Teachers Guide with Activities for Earth and Space Sciences, 1997, NASA, Publication No. EG-1997-10-116-HQ. Greeley, R., King, J.S., 1977, Volcanism of the Eastern Snake River Plain, Idaho: A Comparative Planetary Geology Guidebook. Office of Planetary Geology: NASA, Washington D,C. Hughes, S.S., Thackray, G.D. Eds., 1999, Guidebook to the Geology of Eastern Idaho: Idaho Museum of Natural History Press, Pocatello, ID. Kippenhahn, Rudolf, 1990, Bound to the Sun: The Story of Planets, Moons, and Comets: W.H. Freeman and Company, New York. Limbert, R.W., May 1924, Among the Craters of the Moon, The National Geographic Magazine, Vol 45, No. 3: National Geographic Society, Washington D.C., pp303- 328. Link, P.K., Phoenix, E.C., 1996, Rocks, Rails, and Trails, 2nd Edition: Idaho Museum of Natural History Press, Pocatello, ID.

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Craters of the Moon National Monument and Preserve
P.O. Box 29

Arco, ID 83213

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(208) 527-1300
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