Seafloor spreading theory evidence ppt.
The sea floor spreading theory powerpoint presentation.
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The seafloor spreading theory powerpoint presentation.
Mapping the mid ocean ridge the east pacific rise is just one part of the mid ocean ridge the longest chain of mountains in the world.
During world war ii geologist harry hess became interested in mapping the ocean floor using sonar.
In the 1960s scientists found evidence that new.
S eafloor spreading this presentation reviews the major features of the seafloor and harold hess original theory of seafloor spreading.
At the mid ocean ridge molten material rises from the mantle and erupts.
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Seafloor spreading theory ppt.
Topic objectives for groupreporters c.
The molten material spreads out pushing older rock to both sides of the ridge.
Seafloor spreading seafloor spreading 5 4 p.
141 147 seafloor spreading until the 1950 s little was known about the ocean floor but after sonar was invented a complex ocean floor.
In 1912 when alfred wegener proposed that the continents had once been joined together and had split apart the biggest weakness in his hypothesis was the.
Sea floor spreading 1 sea floor spreading 2 sea floor spreading.
Seafloor spreading theory hess dietz hypothesis 7.
The time it takes for the.
Sea floor spreading enumerate and explain the initial and unusual observations that led to the formulation of the sea floor spreading hypothesis.
This process that continually adds to the ocean floor is sea floor spreading.
Differentiate continental crust from oceanic crust and explain why the continental crust is older than the.
27 evidence for sea floor spreading.
The mid ocean ridge curves like the seams of a baseball along the sea floor extending into all of earth s oceans.
Most of the mountains in the mid ocean ridge lie hidden under hundreds of meters of.
3 sea floor spreading sonar a device that bounces sound waves off under water objects and then records the echoes of these sound waves.
Evidence for sea floor spreading in 1960 harry hess studied wegener s theory hess proposed the radical idea that the ocean floorsmove like a conveyer belt which in turn move thecontinents this movement begins at the mid ocean ridge whichforms along in a crack in the oceanic crust.
Seafloor spreading theory slideshare.
Mid ocean ridge the longest chain of mountains in the world these are divergent plate boundaries.
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