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Rock Review

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Clastic. Organic. Chemical. An example of a chemical rock is. Halite ... Clastic rocks are. rocks that are made of other rock particles cemented together ... – PowerPoint PPT presentation

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Title: Rock Review


1
Rock Review
2
There are three types of Rocks
  • Igneous
  • Metamorphic
  • Sedimentary

3
Rocks are classified according to
  • How they were formed

4
Igneous rocks are formed from
  • Molten material
  • The molten material cools and crystallizes

5
Magma
  • Forms under the Earths surface
  • Intrusive rocks
  • Cools slowly

6
Lava
  • Forms on the surface of the Earth
  • Cools fast
  • Forms extrusive rocks

7
Large Crystals are formed by
  • Slow cooling

8
Small crystals are formed by
  • Fast cooling

9
Sedimentary rocks are formed by
  • The compaction and cementation of sediments

10
Sedimentary rocks can be classified as
  • Clastic
  • Organic
  • Chemical

11
An example of a chemical rock is
  • Halite

12
An example of an Organic Rock is
  • Coal- once living organisms compacted together

13
Clastic rocks are
  • rocks that are made of other rock particles
    cemented together

14
Stratification is
  • The layering of sediments which turn in to rock
    layers

15
Most of the sedimentary rocks are found
  • On the surface of the continental crust

16
Metamorphic rocks are formed
  • By heat and pressure

17
Banding or Foliation
  • When rocks are squished to the point of minerals
    flattening out to create bands.
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