Rock Type Characteristics

Rock Type Characteristics

1. Sedimentary Rocks

   • Often contain fossils
   • Are formed in layers
   • Are classified by texture and composition
   • Great variation in particle size

2. Igneous Rocks

   • Formed from cooled magma and lava
     • Intrustive Rocks form under the surface
     • Extrusive rocks form on the surface
   • Highly resistant
   • Do not contain fossils

3. Metamorphic Rocks

   • Are formed from other rocks
   • Are formed under great heat and pressure
   • Have fossils but they are usually deformed
   • Have crystals that are arranged in layers