Please enable JavaScript.

Coggle requires JavaScript to display documents.

Plate Tectonics (How does it work? (Ridge push/ slab pull (Slab pull is…

- - - - Three types of convergent boundaries
        
        Oceanic- Continental
        
        Makes volcanoes
        
        Continental- Continental
        
        Makes mountains
        
        Continental crust is made of silica
        
        Oceanic- Oceanic
        
        Island arcs
        
        Oceanic crust is made of metals
    - - Radioactive decay melts mantle closest to core
      - Melted mantle is less dense, so it goes to the top
  - - - Tsunami!
    - - Mountains
        
        Rocky mountains
      - Islands
      - Oceans
      - Volcanoes
        
        Shield cone- Haiwii
        
        Composite cone/ strato volcano- Mt. St. Helens
        
        Cinder cone
- - - - Fossils match
        
        We can find the same fossil remains in South America that are also in Africa
      - Ancient climates
        
        Wegener found coal on Antarctica
        
        Significant because coal is only formed in tropical areas
        
        Proved Pangea because coal is made in tropical climates
        
        This tells us that Antarctica was once in a different position on Earth's surface
        
        Ice fields in Utah tells us that we were once a cold climate
      - Fit like a puzzle
        
        Africa and South America fit like a puzzle
        
        North America and Africa also fit like a puzzle
      - Geologic units match
        
        The Appilachian mountains and the Scottish Highlands match
        
        The layers of the Earth match when we put Pangea back together
- - - - It goes all the way to the crust and a volcano is formed
    - - The plates move as fast as your fingernails grow