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GEOLOGY 12 CHAPTER 9 WS #1 PLATE TECTONICS Name ____________________ PART A: TECTONIC FEATURES 1. Draw in the asthenosphere, lithosphere and an accretionary prism. 2. Color the diagram below using the figures on pages 192-194 as a guidelines. 3. Add missing labels as necessary. You should be able to identify and describe all of the following tectonic features. • • • • • • • • • accretionary prism (p.193)* asthenosphere / lithosphere (p.178)* Benioff zone (see p.188) a convection cell (p.191) convergent boundary divergent boundary hot spot and plume island arc (p.187) volcanic mountains (p.187) • • • • • • • • mid-oceanic ridge / spreading ridge / rift zone paired metamorphic belts (p.193) trench subduction zone transform faults passive margin (p.270)* active margin (p.273) arrows indicating direction of plate movement (p.191) *not included on diagram PART B: GEOLOGIC PROCESSES AT PLATE BOUNDARIES Types of Boundaries # Complete the following chart by placing check marks in the appropriate columns. Geologic Process Type of Plate Boundary Divergent Convergent (ridges, rises, seafloor spreading) (subduction zones, colliding plates) Shear (transform faults) 1. creation of oceanic crust 2. destruction of oceanic crust 3. thick accumulation of sediment 4. volcanism 5. formation of batholiths 6. creation of fold-fault mountain ranges 7. compression 8. tension 9. shear 10. normal faulting 11. strike-slip faulting 12. reverse and thrust faulting 13. shallow-focus earthquakes only 14. both shallow & deep-focus earthquakes Chapter 9 WS #1 page 2 PART C: PLATE MOVEMENT • You will need a ruler for this activity. • Assume this map is to scale. Calculate the rate of movement of the Pacific Plate that carried the Hawaiian Islands away from the hot spot that is now located located at the southern tip of the big island of Hawaii. Use the following formula: Rate (cm/yr) = Distance Traveled (cm) Age (yr) _______ my __________ km _______ my D ____________ km _______ my C ____________ km B A _______ my ____________ km Chapter 9 WS #1 page 3 Part D: Plate Tectonics and the Rock Cycle 1. Label the diagram below with the following terms • • • • Juan de Fuca Plate North American Plate Pacific Plate Mt. Baker • • • • Juan de Fuca Ridge trench magma subducting plate • Queen Charlotte Fault • locked zone • arrows indicating direction of plate movement 2. Label the location of the Accretionary Prism and the Benioff Zone. 3. Number these steps of the Rock Cycle on the diagram below. Refer to page 192 of the textbook for additional information. 1. magma 2. sediments 3. heat and pressure 4. extrusive igneous rock 5. intrusive igneous rock 6. sedimentary rock 7. Metamorphic rock Chapter 9 WS #1 page 4