MI_study-sheet_2008

MI_study-sheet_2008 - OUTLINE FOR MIDTERM I Lecture 1...

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SPRING 2008 PROF. SAMMIS Lecture 1 Radioactive isotope Half life Age of the Earth – how determined Age of rocks – which isotopes and why? Oldest continental rocks (where) Oldest oceanic rocks Power of ten notation Ages of sun and other planets. Age of universe – how determined? Lecture 2 What is an earthquake? Fault plane Fault trace Fault scarp Hypocenter (focus) Epicenter Where earthquakes occur 3 types of plate boundary divergent = mid-ocean ridges convergent = trench/island-arc structures transform = fracture zones linking sections of mid-ocean ridges. Plate tectonics Lithospere (difference between lithosphere and crust) Aesthenosphere Mantle Convection Hot spots Continental Collisions Nature of seismicity at each type of plate boundary. Where do deep-focus earthquakes occur – how deep? Lecture 3 Wegener’s evidence for plate tectonics Fit of continents 300 million year old southern ice sheet 250 million year old deserts migration of species from paleontological record. Modern Evidence
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This note was uploaded on 05/12/2008 for the course GEOL 240 taught by Professor Sammis during the Spring '08 term at USC.

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MI_study-sheet_2008 - OUTLINE FOR MIDTERM I Lecture 1...

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