Lecture 6
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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 (dayt ime) Webpage for course (nigh ttime)
description
In nature things move violently to their place and quietly in their place. - Francis Bason Intrusive rocks. Lecture 6. Webpage for course (daytime). Webpage for course (nighttime). long cooling time allows crystals to grow larger. Intrusive (plutonic) rocks. pluton. - PowerPoint PPT Presentation
Transcript of Lecture 6
Lecture 6
In nature things move violently to their placeand quietly in their place.
- Francis Bason
Intrusive rocks
Webpage for course (daytime)
Webpage for course (nighttime)
Intrusive (plutonic) rocks
long cooling time allows crystals to grow larger
pluton
Pluton: large intrusive igneous rock body
can take a variety of shape and sizes
tabular massive
Tabular plutons, two general types
CONCORDANT
D I
S C
O R
D A
N T
Tabular plutons, two general types
CONCORDANT
Example: sill
D I
S C
O R
D A
N TExample:
dike
Massive plutons, two general types
stocks
< 100 square km
Bathylith
(“deep rock”)
> 100 square km
Associated with modern magma chambers
- geysers- hot springs
“Old Faithful”Yellowstone N. P.
Fig. 10.18
“Old Faithful”
http://www.nps.gov/archive/yell/tours/livecams/oldfaithful/images/oldfaithfulbehivelabeled.jpg&imgrefurl=http://www.nps.gov/archive/yell/tours/livecams/oldfaithful/oldfaithfulphoto.htm&usg
What causes a geyser?
Geothermal Energy
Geothermal Energy
Inexpensive(after initial cost)
Long lastingLow environmental cost
Need Shallow
Magma chamber
DisadvantagesAdvantages
Why not use the magma chamber below Old Faithful?
“Geothermal Energy”
- ground – based heat pumps
The metric system!
(still have time??)
ConvenienceAccuracyEconomy
Why metric?
