Ronnie's powerpoint 1


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Ronnie's powerpoint 1

  1. 1. By: Ronnie Staton
  2. 2. Rock Classifications What are the three main types of rocks?  Igneous  Sedimentary  Metamorphic
  3. 3. Igneous Rocks Can be a single mineral or an aggregate of many minerals Created by volcanic activity Can form on earth’s surface or below it Oldest Rocks on earth
  4. 4. Minerals Composed of one substance Can be a single element Examples:  Halite (salt)  Sulfur  Quartz  Calcite
  5. 5. Igneous Rocks Cont.Coarse Grain Rocks Intrusive – Formed inside the earths surface Cooled slowly Large crystals – Slow cooling allowed the crystal forming minerals more time to collect Examples:  Granite  Gabbro
  6. 6. Igneous Rocks Cont.Fine Grain Rocks Formed at earths surface – above ground or under water Cooled very quickly Examples:  Basalt  Rhyolite  Obsidian – volcanic glass  no crystals due to instant cooling
  7. 7. Sedimentary Rocks Not formed from volcanic activity Made of other rocks and minerals Grain size can range from not present to huge boulders Pieces that make up a sedimentary rock are called sediments.
  8. 8. Sedimentary Rocks The two types of sedimentary rocks are:  Clastic  Non-Clastic
  9. 9. Clastic Sedimentary Rocks Made up of rock fragments, shells, or other sediments cemented together Can often see or feel the different sediments in the rock Examples  Sandstone  Conglomerate  Breccia
  10. 10. Non-Clastic Sedimentary rocks Usually made of one chemical Can be composed of:  Precipitated minerals in water  Once living plants or organisms Examples:  Coal  Gypsum  Limestone
  11. 11. Metamorphic Rocks Rocks that have undergone change due to extreme heat and pressure The rocks and minerals contained in them do not melt during this process.
  12. 12. Metamorphic Rocks There are two main types of metamorphic rocks, what are they?  Stratified  Non-stratified
  13. 13. Stratified Rocks Rocks that have visible bands of minerals Bands run in lines that resemble layering Has had extreme pressure applied to two opposite sides The bands are minerals that grouped together during the extreme pressure
  14. 14. Examples of Stratified RocksParent Rock Metamorphosed Rock Granite  Gneiss by Andrew Alden  by Andrew Alden Shale  Schist by Andrew Alden  by Andrew Alden
  15. 15. Non-stratified Rocks No rings or bands Noticeable change from parent rock Pressure was applied from all directions Parent Rock Metamorphosed Rock •Limestone •Marble •Photo by: Georges Grondin Photo by: Titus Tscharntke
  16. 16. Bibliography Levin, Harold L. The Earth through Time. Hoboken, NJ: J. Wiley, 2010. Print. "Marble Blocks Public Domain Image Picture." Marble Blocks Public Domain Image Picture. N.p., n.d. Web. 15 Oct. 2012. < pictures/rock-stone-texture-public-domain-images-pictures/marble-blocks.jpg.html>. "Non-Clastic Sedimentary Rocks." Non-Clastic Sedimentary Rocks. N.p., n.d. Web. 12 Oct. 2012. <>. "Rock Picture Index." Geology. N.p., n.d. Web. 15 Oct. 2012. <>. "Wetstone Pattern Public Domain Image Picture." Wetstone Pattern Public Domain Image Picture. N.p., n.d. Web. 15 Oct. 2012. < pictures/rock-stone-texture-public-domain-images-pictures/wetstone-pattern.jpg.html>. "Wildaboutrocks." Sedimentary Rocks -. N.p., n.d. Web. 12 Oct. 2012. < Information/Sedimentary-Rocks>.