ERTH 2403 Lecture 4: Lecture 4
26 Apr 2016
School
Department
Course
Professor
Document Summary
Lecture 4: there are three times of convergent plate boundaries, oceanic to oceanic crust. *volcanic island arcs the rocks created are basaltic rocks. Subducting plates will melt and create magma and volcanoes and these volcanoes will become islands (like japan and the philippines). Behind the volcano islands is called the back arc. Trenches are also made in ocean-to-ocean crusts: oceanic to continental crust. The denser crust subducts because it"s heavier. The causes trenches (where oceanic crust is lost) Volcanic arc on the continent the rocks are andesitic. Deep, intermediate, and shallow earthquakes: continental to continental crust collision this creates mountains. Older crusts are denser and will subduct under newer, less dense crusts. Indian crust is subducting under asia and is creating volcanism known as the. Himalayans and andies: transform fault plate boundaries. Good evidence of the movement of plate tectonics and plate movement.
