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Wegener
Pangae
aContinental
Drift
Evidence for Continental Drift
Mesosaurus dino fossils Glossopteris
plant fossils
Formation and age of particular mountains
Shape of continents
Plate Tectonics- earth’s lithosphere is cracked into sections called “PLATES”
Evidence found in the ocean floor~
seafloor spreading
Plate movement-
caused by convection currents
Plate Movement Labeled
Converging Plates
Convergent Plates2 Land carrying plates converge pushing each other up forming mts.
Converging Oceans
2 ocean plates converge and the more dense plate will subduct beneath the less dense plate.
Converging Land with Ocean Plate
The denser ocean plate subducts beneath the continental plate forming mountains and or volcanoes.
Diverging Plates
When 2 ocean plates diverge a ridge is formed
Seafloor Spreading
Another name for 2 ocean plates diverging.
When 2 continental plates diverge a rift valley forms
Transform BoundaryTwo plates move side to side. When the plates get stuck and suddenly release, an earthquake occurs
Ring of Fire
Pacific Plate- Ring of Fire the Pacific Plate is moving north west relative to the plate
that holds North America as it rotates around Hawaii.
www.soest.hawaii.edu/GG/ASK/plate-tectonics2.html
The movement of the plate involves subduction of itself or the plate it moves against and is causing earthquakes, volcanoes, trenches and ridges around the entire perimeter of the plate~ hence the ring of fire.
Websites for Plate Tectonicshttp://www.enchantedlearning.com/subjects/dinosaurs/glossary/Pangaea.shtml
http://wrgis.wr.usgs.gov/docs/parks/pltec/index.html
http://www.nationalgeographic.com/forcesofnature/
http://www.nationalgeographic.com/forcesofnature/interactive/index.html?section=t
http://www.thetech.org/exhibits_events/online/quakes/plates/divergent.html