27 evidence for sea floor spreading.
The sea floor spreading theory powerpoint presentation.
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.
Differentiate continental crust from oceanic crust and explain why the continental crust is older than the.
S eafloor spreading this presentation reviews the major features of the seafloor and harold hess original theory of seafloor spreading.
Sea floor spreading powerpoint 1.
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The mid ocean ridge curves like the seams of a baseball along the sea floor extending into all of earth s oceans.
At the mid ocean ridge molten material rises from the mantle and erupts.
Powerpoint click to download the ms powerpoint file 34 mbytes pdf click to view or download the presentation in pdf 2 1 mbytes ht ml cl ick to view the presentation in html format.
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Powerpoint ppt presentation free to view.
Seafloor spreading seafloor spreading 5 4 p.
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This process that continually adds to the ocean floor is sea floor spreading.
Seafloor spreading theory slideshare.
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.
Seafloor spreading theory evidence ppt.
Seafloor spreading theory hess dietz hypothesis 7.
The molten material spreads out pushing older rock to both sides of the ridge.
In the 1960s scientists found evidence that new.
Seafloor spreading theory ppt.
Most of the mountains in the mid ocean ridge lie hidden under hundreds of meters of.
Sea floor spreading 1 sea floor spreading 2 sea floor spreading.
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.
Mid ocean ridge the longest chain of mountains in the world these are divergent plate boundaries.
During world war ii geologist harry hess became interested in mapping the ocean floor using sonar.
Enumerate and explain the evidences that support the sea floor spreading process.
141 147 seafloor spreading until the 1950 s little was known about the ocean floor but after sonar was invented a complex ocean floor.
