Geology

Geology

1. Crust

   • Oceanic crust
     • Ocean-Ocean divergent
       • Land separate and lava spew out
         • New ocean crust is formed
         • Known as mid ocean ridges
           • Mid atlantic range
     • Ocean-Continental convergent
       • Subduction zone, creates a trench
         • Also creates Volcanoes
     • Ocean-Ocean convergent
       • Subduction happens over here
         • The upper crust has volcanoes form onto it, creating a volcanic arc
   • Continental Crust
     • Continent-Continent convergent
       • Can create mountain such as himalayas
     • Continent Continent Transform, Strike slip
       • Produces the largest Earthquakes
       • San Andreas; Haiti

2. jasons notes

   • Convergent boundaries
     • Usually where all the big and frequent earthquakes happen
     • Subduction generally takes place over here
   • Divergent boundaries

3. EARTHQUAKES

   • Body
     • P waves
       • Primary waves, fastest to reach
       • Are recorded in vibration
       • Harder to read the the power of the earthquake
       • Parallel to the direction of travel
     • S waves
       • Shaped like S
       • Second waves to reach
       • (S wave time - P wave time) * velocity = distance of earthquake
       • perpendicular
   • Surface
     • Rayleigh
     • Love
   • Conditions for earthquakes
     • Cold, brittle rocks
     • warm, strong rocks

4. Rocks deformation

   • Elastic deformation
     • Rocks are stretched and respond by elastic rebound and store energy
     • Can result in Brittle failure
       • Happens when the rocks break and cant return to how they were before

5. Liquification

   • When pressure squeezes out the water out of lose particles
     • Generally bad