Some Review Plate Tectonics Theory: The lithosphere (crust + solid uppermost man

Question

Some Review Plate Tectonics Theory: The lithosphere (crust + solid uppermost mantle) is fractured into approximately 12 lithosphere plates (tectonic plates), which are in motion relative to each other. The plates interact at their boundaries (outer edges). These interactions result in most of the major geological features on the planet, such as volcanoes, mountain ranges, earthquakes, ocean trenches, sea floor spreading zones and mid-ocean ridges. __________________________________________________________________________________ There are 3 basic types of plate boundary interactions: 1) Divergent plate boundaries (plates move apart from each other); ````` Results: Sea floor spreading zone, mid-ocean ridge, earthquakes, volcanoes and hydrothermal vents (Sea water seeps down rock fractures where it is heated by magma and returns to the sea floor as hot springs). 2) Convergent plate boundaries (two plates move toward each other): a. Ocean-continent plate convergence: Results in subduction of the ocean plate (denser), volcanoes on the adjacent (non-subducting) plate, ocean trench and earthquakes. b. Ocean-ocean plate convergence: Results in subduction of one of the ocean plates, island arc (volcanoes on the non-subducting plate), ocean trench and Earthquakes. c. Continent-continent plate convergence: Results in smashup rather than subduction, mountain building and earthquakes but no volcanoes (no subduction). 3) Transform plate boundaries (plates move past one another in opposite directions) Result: Earthquakes, no mountains (usually) and no volcanoes. ___________________________________________________________________________________ The following questions are based on the handout world map of tectonic plates. 1a. What type of boundary is the San Andreas Fault in California? a) convergent b) divergent c) transform 1b. What landforms and/or occurrences would you expect along the San Andreas Fault? a. volcanoes b. earthquakes c. sea floor spreading d. all of the above 1c. List the names of three other locations were significant transform boundaries are found. Find the locations on the map of tectonic plates, then figure out names of these locations. You may have to look up some of the place names. (Hint: 20N, 80W / 50S, 30E). Not all transform faults on the map have accompanying arrows.

Explanation / Answer

1a. San Andreas fault in California is a Transform Fault.

1b. Earthquakes

1c. The Alpine Fault in New Zealand

Middle East's Dead Sea Transform fault

Pakistan's Chaman Fault

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