1. Plate Tectonics A Brief Overview

2. The Earth’s Plates http://www.nature.nps.gov/geology/usgsnps/pltec/pltec2.html

3. Layers of the Earth ChemicalPhysical http://www.burkemuseum.org/static/geo_history_wa/The%20Restless%20Earth%20v.2.0.htm

4. Layers of the Earth and Food Lithosphere –Chocolate: when it’s cold, it’s hard and breaks, but as it warms up it can bend and eventually melt Asthenosphere –Honey: it’s thick and sticky, but it flows Mantle –Crumbled cookies: it’s solid but can move and convect Outer core –Milk: liquid Inner core –Peach pit: solid

5. Plate Boundaries Stern, R. J., Subduction zones, Rev. Geophys., 40(4), 1012, doi:10.1029/2001RG000108, 2002

6. Margins: Divergent Mid-Ocean Ridges –Mid Atlantic Ridge Continental Rifts –East African Rift Valley http://www.phschool.com/atschool/phsciexp/internet_acti vity/cfd-1014_midocean.html http://www.talktalk.co.uk/reference/encyclopaedia/hutchi nson/m0006339.html

7. Margins: Convergent Ocean-ocean subduction –Island arc: Marianas http://www.see.leeds.ac.uk/structure/dynamicearth/subduction/cordillera_islandarc.htm

8. Margins: Convergent Ocean-continent subduction –Volcanic arc and mountains: Andes http://www.see.leeds.ac.uk/structure/dynamicearth/subduction/cordillera_islandarc.htm

9. Margins: Convergent Continent-continent collision –Large mountain range: Himalayas and Alps http://www.unil.ch/igp/page23575_en.html

10. Margins: Transform Marine –Transform faults: Mid Atlantic Ridge Terrestrial –Strike-slip faults: San Andreas Fault http://geomaps.wr.usgs.gov/archive/socal/geology/inland_empire/socal_faults.html

11. Evidence for Plate Tectonics Fit of the continents Sea floor ages and magnetic anomalies – evidence of ocean spreading Paleontology – similar species on now widely separated continents Seismicity and volcanism concentrated at plate boundaries – evidence of oceanic subduction Hot spot tracks – record movement of plates over “fixed” hot spot GPS