GEO 102 Lecture 32 Outline of Last Lecture I Extinction and what is a dinosaur Outline of Current Lecture II What happens when plates collide III Appalachians IV Rocky Mountains V Andes VI Himalayas Current Lecture What Happens when plates collide Ocean versus continental o Oceanic plates subduct o Volcanic arcs and mountains Ocean versus ocean o Older cooler and denser plates o Volcanic arcs Continent versus continent o Collision no subduction thickened structure o Largest mountains Appalachians Taconic orogeny 496 440 million years ago Major events began o 300 million years ago Pangea Several events combined o Acadian o Alleghenian Appalachian Rocky Mountains Laramide orogeny 70 80 million years ago until 35 55 million years ago 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 Episodic Convergent ocean continental boundary Little volcanism low subduction angle Andes Classic ocean continental subduction 200 million years ago to present Altiplano contributed to o Cenozoic cooling nd 2 highest range Himalayas Highest mountain range Still forming Continent continent collision Led to Cenozoic cooling
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