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Physical Geology Chapter 2 Internet Exercise

The National Geophysical Data Center maintains an extensive archive of geophysical data and measurements from around the world. In this exercise, you will access information on the occurrence of thermal springs in the United States of America.

1. Go to the database of U.S. thermal springs.

2. Once at this site, go to the bottom of this page and click Select Data button. This will bring up the entire data base.

3. Now copy the data to your computer clipboard by simultaneously keying the "Ctrl" and "C" keys on your computer keyboard.

4. Open Microsoft Excel on your computer. When the program has loaded, click on the upper left cell of the spreadsheet and paste the data from the clipboard into the spreadsheet by simultaneously keying the "Ctrl" and "V" keys.

5. If the data did not parse into separate cells, you will need to use the convert the text to columns using the "Text to Columns" option under the "Data" tab of the menu bar.

6. Once you have parsed your data into the spreadsheet, you can answer the questions below.

a. How many thermal springs are tabulated in this database?

b. How many states have recorded thermal springs? Which part of the United States has the greatest concentration of thermal springs? Why do you think this is so? What geological explanations are there for this phenomenon?

c. Which state has the largest number of recorded thermal springs? Why do you think this is so?

d. What is the highest reported temperature for the springs in the database? Provide the name and location (latitude, longitude, state) for this spring.

e. What is the coolest reported temperature for the springs in the database? Provide the names and locations for these springs.

f. Why does NGDC maintain this database? What bearing do thermal springs have on geophysics?








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