ERS120H5 Lecture Notes - Lecture 3: Oceanic Crust, Seafloor Spreading, Divergent Boundary
Document Summary
This can occur between ocean-ocean, ocean-continent and continent-continent: transform plate boundaries: two plates slide past each other in opposite directions. This can occur between continent-continent, ocean-continent, and ocean-ocean: recognize the different types of plate boundaries (e. g. transform/continent-continent or convergent/ocean-continent, etc. ) from the distribution of earthquakes, volcanoes, topography and age of the ocean floor. Earthquakes: most common in areas of convergent boundaries. Volcanoes: most likely to be seen near divergent boundaries. Topography: convergent ocean-ocean form deep trenches, convergent ocean-continent forms a trench, convergent continent-continent forms a mountain range, transform continent-ocean forms a step, divergent continent-continent form a trench, divergent ocean-ocean forms a mountain range. Age of the ocean floor: divergent ocean-ocean is young because new oceanic crust is formed: explain some of the different features found at ocean-ocean, ocean-continent and continent- continent convergent zones (trench, volcanic arc, mountain range). Ocean-ocean: trench, many earthquakes, mix of volcanoes (ex: australia pacific near new. Ocean-continent: trench, many earthquakes, more volcanoes (ex: nazca south america)
