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Lecture 6 In nature things move violently to their place and quietly in their place. - Francis Bason Intrusive rocks Webpage for course (daytime) Webpage.

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Presentation on theme: "Lecture 6 In nature things move violently to their place and quietly in their place. - Francis Bason Intrusive rocks Webpage for course (daytime) Webpage."— Presentation transcript:

1 Lecture 6 In nature things move violently to their place and quietly in their place. - Francis Bason Intrusive rocks Webpage for course (daytime) Webpage for course (nighttime)

2 Intrusive (plutonic) rocks long cooling time allows crystals to grow larger pluton

3 Pluton: large intrusive igneous rock body can take a variety of shape and sizes tabularmassive

4 Tabular plutons, two general types CONCORDANT D I S C O R D A N T

5 Tabular plutons, two general types CONCORDANT Example: sill D I S C O R D A N T Example: dike

6 Massive plutons, two general types stocks < 100 square km Bathylith (“deep rock”) > 100 square km

7 Associated with modern magma chambers - geysers - hot springs “Old Faithful” Yellowstone N. P. Fig

8 “Old Faithful” htm&usg

9 What causes a geyser?

10 Geothermal Energy

11 Inexpensive (after initial cost) Long lasting Low environmental cost Need Shallow Magma chamber DisadvantagesAdvantages

12 Why not use the magma chamber below Old Faithful?

13 “Geothermal Energy” - ground – based heat pumps

14 The metric system! (still have time??)

15 Convenience Accuracy Economy Why metric?

16


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