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THE GEOSPHERE (MINERALS AND ROCKS) image (METAMORPHIC ROCKS (Some of…

- - - - Sometimes their trap our bubbles inside
      - For example: Basalt, pumice and obsidian.
      - Formed when lava on the Earth's surface cools and solidifies
    - - They often have crystals that are easy to see
      - Examples: Granite most abundant on land and used in construction. Peridotite the most abundant rock in mantle
      - Formed when magma under the Earth's surface cools and solidifies
- - - - Types
        
        Silky
        
        Pearly
        
        Glassy
        
        Adamantine
        
        Metallic
        
        Matte
  - - - Tenacity.
        If it breaks easily it's brittle
        if not, it's though
      - Fracture and Cleavage
      - Hardness. It's measured using
        the Mohs scale
- - - - Joining the clasts together is an Einer material
        which is called Matrix
      - Sedimentary rocks with grains (called clasts)