GLG 112 1st Edition Lecture 1Outline of Last Lecture Plate boundariesI. DivergentA. OceanB. ContinentsC. Young plate boundariesII. ConvergentA. Subduction1. Oceanic2. ContinentalOutline of Current Lecture III. ConvergentA. Subductiona. Oceanic/continentalb. Oceanic/oceanicB. Continental CollisionCurrent LectureConvergent plate boundaries are places where plates are coming together. Subduction is where one plate goes down underneath another. These create trenches, earthquakes, and volcanoes These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.(on the overriding plate). There are two types of convergent plate boundaries. They are oceanic and continental and also oceanic and oceanic.Oceanic/continental plate subduction is when the oceanic plate goes underneath the continental plate. Earthquakes and volcanoes occur in these spots. An example of this is the Cascade Mountains in the northwest.Oceanic/oceanic subduction is where the heavier plate subducts (or goes underneath). Oceanic plates get heavier as they get older. These create earthquakes and volcanoes. The volcanoes become volcanic islands. A chain of volcanoes in the ocean is called an island arc. An example ofthis is the Aleutian Islands in Alaska. A Continental Collision is where two continental plates collide and create mountains. A thicker lithosphere is also created. There is no volcanic activity but plenty of earthquakes (up to magnitude 8). An example of this is the Himalayan
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