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Rocks and The Rock Cycle

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Title: Rocks and The Rock Cycle Author: Susan Thurston Last modified by: Test Created Date: 12/3/2007 12:53:10 AM Document presentation format: On-screen Show (4:3) – PowerPoint PPT presentation

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Tags: cycle | gneiss | rock | rocks

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Title: Rocks and The Rock Cycle


1
Rocks and The Rock Cycle
2
3 Main Rock Types
3
3 Main Rock Types
4
Igneous
5
Igneous
6
IGNEOUS---Extrusive Little or NO Crystals!
7
IGNEOUS---Extrusive Little or NO Crystals!
8
IGNEOUS---Extrusive Little or NO Crystals!
9
IGNEOUS---ExtrusiveLittle or NO Crystals!
10
Igneous
11
IGNEOUS---IntrusiveLarge Interlocking Crystals!!!
12
IGNEOUS---Intrusive Large Interlocking Crystals!
13
IGNEOUS---Intrusive Large Interlocking Crystals!
14
IGNEOUS---Intrusive Large Interlocking Crystals!
15
3 Main Rock Types
16
How to make a clasticsedimentary rock
17
Sedimentary
18
(No Transcript)
19
3 Main Rock Types
20
Metamorphic rocks form from HEATPRESSURE
21
Contact Metamorphism
  • Deep underground, zones of metamorphism form
    around the hot magma of batholiths.
  • L.Gardiner/Windows Original

22
Regional Metamorphism
  • Tectonic forces smash continents together. The
    rocks get heated and become semi-molten. The
    added pressure causes the mineral to separate
    into bands and sometime to even flow before
    cooling again!

23
How are Metamorphic rocks formed?
24
Common Metamorphic Rocks
Parent Rock Metamorphic Rock
Granite Gneiss
Shale Slate
Sandstone Quartzite

25
Foliated - vs. - Non Foliated
  • Foliated These types of metamorphic rock are
    distinctly layered.
  • This is due to the immense directional pressure
    that the rock is exposed to.

26
Foliated Examples
27
Foliated - vs. - Non-Foliated
  • Non-Foliated
  • As opposed to the foliated metamorphic rocks, the
    non-foliated rocks are not distinctly layered.   
  • This is probably because non-foliated rocks were
    exposed to high temperature conditions, but not
    to high directional pressure conditions.  

28
Non Foliated Examples
Marble from Limestone
Quartzite from Sandstone
29
The Rock Cycle
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