Transcript Slide 1

The earth is not finished, but is now being,
and will forevermore be re-made.
- C.R. van Hise (1898)
Metamorphic Rocks
Webpage for course (daytime)
Webpage for course (nighttime)
Lecture 10
Three types of rocks:
- Igneous
-Sedimentary
- Metamorphic
Not “formed” as much as “reformed”
Sedimentary rocks:
Form at room temperature
Atmospheric pressure
What happens when pre-existing rocks are
subjected to high P & T?
Their minerals may no longer be stable
Bread analogy
Two general types of metamorphism
Regional metamorphism
Contact metamorphism
Contact metamorphism
dike
Regional metamorphism
Metamorphic rocks are divided into two groups
Foliated
< http://mulch.cropsoil.uga.edu/soilsandhydrology/
Important%2520Rocks%2520%26%2520Minerals.htm&usg >
Nonfoliated
< http://www.personal.psu.edu/cll161/insys%2
520441/images/foliate.jpg&imgrefurl
Foliated
Granite
>>>>>>>>>>
Gneiss
Shale >>>> Slate >>>> Phyllite >>>> Schist
< http://charlottehutson.wordpress.com/2010/03/02/early-gravestone-art-in-charleston/&usg >
Nonfoliated
Limestone
>>>>>>>>>>
Marble
Sandstone
>>>>>>>>>>
Quartzite
Metamorphic Rocks as Building materials
What is the “best” building material?
Define “best”
inexpensive
beautiful
longlasting