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Download Geologic Processes at Plate Boundaries KEY
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Geologic Processes at Plate Boundaries Convergent Boundary- Crash Together There are 2 types of convergent boundary: 1. Oceanic plate vs. continental plate Ring of Fire- South America/Pacific Ocean 2. Continental plate vs. continental plate Mt. Everest/ Himalayans Oceanic Plate vs. Continental Plate: This can be: Constructive or Destructive or Both or Neither Subduction- Process where the oceanic crust sink into the mantle The OCEAN plate is denser, therefore, it subducts under the Continental plate. 1. Trench- under water canyon Constructive or Destructive Mariana Trench 2. Volcanoes- A weak spot in the crust where magma has come to the surface Constructive or Destructive Ring of Fire 3. Earthquakes- shaking that results from the movement of rock beneath the Earth’s surface Constructive Destructive NEITHER or Continental Plate vs. Continental Plate: This can be: 1. Constructive or Destructive Mountains- LARGE ELEVATION OF THE EARTH’S SURFACE Mt. Everest or Both or Neither Divergent Boundary- PULL APART This can be: Constructive or Destructive or Both or Neither 1. Sea Floor Spreading- THE PROCESS BY WHICH MOLTEN ROCK ADDS NEW OCEANIC CRUST TO THE OCEAN FLOOR Constructive or Destructive *The oceanic floor closest to the mid-ocean ridge is NEWER. Farther away from the ridge the oceanic floor is OLDER. 2. Mid-Ocean Ridge- AN UNDERSEA MOUNTAIN CHAIN Constructive or Destructive or Destructive NEITHER MID-ATLANTIC RIDGE 3. Earthquakes Constructive Transform Boundary- SLIDE PAST This can be: Constructive or Destructive or Both or Neither 1. Fault- A BREAK IN THE EARTH’S CRUST 2. Earthquakes Constructive SAN ANDREAS FAULT- CALIFORNIA or Destructive NEITHER
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