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Mid-ocean ridge

Holt Earth Science Chapter 9, Section 9.4

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Transform Plate Boundaries In a transform plate boundary (transform fault), plates slide horizontally past one another without producing or destroying lithosphere. They commonly connect 2 spreading centers (divergent), or less commonly 2 trenches (convergent). Mostly found on ocean floor (offset segments of oceanic ridge system, producing a steplike plate margin). Zigzag shape of Mid-Atlantic Ridge reflects shape of original shape of rifting Transform faults are part of linear breaks in seafloor (fracture zones) that include active and inactive (extensions) of the transform faults.

Plate Tectonics

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Plate Tectonics .? Theory of how the continents moved apart ( Continental Drift) driven bySeafloor Spreading? .? Tectonics - important motions of Earth?s Crust .? Plates- Make up the crust Tectonic Plates . Crust made up of 12 or so plates study of movement/ formation of these plates Continental Drift .? Theory that all continents are moving across Earth?s surface Evidence: Fossils Glacial Striations/Grooves Rock deposits Jigsaw puzzle of Modern Continents Creation Of Continental Drift .? Alfred Wegener - 1912 .? Continents were together at one point ---> ? Pangea? -- ?All Earth? .? Over millions of years ---> continents split apart .? Wegener discredited because he was a? meteorologist and he could not explain a force for moving plates
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