263027686274175

1,296 views

Published on

0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
1,296
On SlideShare
0
From Embeds
0
Number of Embeds
20
Actions
Shares
0
Downloads
51
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide

263027686274175

  1. 1. Minerals, Rocks and Fossils
  2. 2. What is a mineral? <ul><li>Naturally occurring </li></ul><ul><li>Non-organic </li></ul><ul><li>Characteristic chemical composition </li></ul><ul><li>Distinctive physical properties </li></ul><ul><li>Crystalline structure </li></ul>
  3. 3. Mineral properties <ul><li>Color </li></ul><ul><li>Luster </li></ul><ul><li>Habit (Shape) </li></ul><ul><li>Cleavage & Fracture </li></ul><ul><li>Streak </li></ul><ul><li>Hardness </li></ul><ul><li>Other </li></ul>
  4. 4. Color: <ul><li>Not mineral specific </li></ul>
  5. 5. Luster: <ul><li>How minerals reflect light </li></ul>Non-metallic Metallic
  6. 6. Mineral Habit (Shape) <ul><li>Shape a mineral takes if grown unimpeded </li></ul><ul><li>Mineral Java Applet </li></ul>
  7. 7. Cleavage & Fracture <ul><li>Cleavage: planes of weakness along which minerals can break </li></ul><ul><li>Fracture: surfaces along which minerals can break </li></ul>
  8. 8. Cleavage & Fracture Best identified on a fracture surface
  9. 9. Streak: <ul><li>The powdered form of a mineral </li></ul>
  10. 10. Hardness: <ul><li>Based on Moh’s scale of hardness </li></ul>
  11. 11. Other Properties <ul><li>Specific gravity </li></ul><ul><li>Reaction to acid </li></ul><ul><li>Striations </li></ul><ul><li>Magnetism </li></ul>
  12. 12. Classifying Rocks <ul><li>Rocks are classified by how they formed and what they’re made of </li></ul><ul><li>There are 3 general classes of rocks </li></ul><ul><li>Igneous Rocks …are formed when lava and magma crystallize to form solid rock </li></ul><ul><li>Metamorphic Rocks …are formed when an existing rock is partially melted, squeezed, or both </li></ul><ul><li>Sedimentary Rocks …are formed when sediments (sand clay, and silt) are compressed and become solid rock </li></ul>
  13. 13. Igneous Rocks
  14. 14. Metamorphic Rocks Gneiss Schist
  15. 15. Sedimentary Rocks Shale Conglomerate Sandstone
  16. 16. Fossils The remains or imprints of living things of the past found in Sedimentary rocks.
  17. 17. Fossils provide information about life and conditions in the past.
  18. 18. Fossils of Sea Creatures <ul><li>Oceans once covered the area </li></ul><ul><li>What part of the ocean </li></ul>
  19. 19. Fossils of Plants <ul><li>Plant fossils can tell us about the ancient environment </li></ul>
  20. 20. Animal Fossils <ul><li>Animal fossils can tell us </li></ul><ul><ul><li>About past environments </li></ul></ul><ul><ul><li>What the animal ate </li></ul></ul><ul><ul><li>How they lived </li></ul></ul>

×