GEO 102 Lecture 10 Outline of Last Lecture I How the earth works Outline of Current Lecture II Rock Types III Igneous IV Metamorphic V Sedimentary Current Lecture Rock Types Igneous Extrusive Intrusive Metamorphic Differing grades Differing stress Sedimentary Clastic Chemical When two oceanic plates meet the older and the colder plate sinks younger rock is more buoyant When two continental plates meet nothing sinks Mountains form 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 The passive margin is the back part of the plate most extrusive igneous rocks form on divergent boundaries Water evaporates plants use it percolates down to become groundwater flows to the river and down to the sea
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