Ocean Sea Floor Spreading Diagram

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Ocean sea floor spreading diagram. Most of the mountains in the mid ocean ridge lie hidden under hundreds of meters of. These age data also allow the rate of seafloor spreading to be determined and they show that rates. The oceanic crust is composed of rocks that move away from the ridge as new crust is being formed. This graphic shows several ocean floor features on a scale from 0 35 000 feet below sea level.

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. Sea floor spreading powerpoint 1. The mid ocean ridge is the region where new oceanic crust is created. Spreading rates determine if the ridge is fast intermediate or slow.

The process of sea floor spreading. The rate at which new oceanic lithosphere is added to each tectonic plate on either side of a mid ocean ridge is the spreading half rate and is equal to half of the spreading rate. Whats people lookup in this blog. This diagram provides evidence of seafloor spreading by showing the ages of ocean floor in the atlantic and eastern pacific oceans.

The size of an ocean is determined by how fast is created at a mid ocean ridge and how fast subduction occurs at a deep ocean trench. This idea played a pivotal role in the development of the theory of plate tectonics which revolutionized geologic thought during the last quarter of the 20th century. The formation of the new crust is due to the rising of the molten material magma from the mantle by convection current. The magnetism of mid ocean ridges helped scientists first identify the process of seafloor spreading in the early 20th century.

What is an example of ocean floor material that supports sea floor spreading. Where does subduction occur. Basalt the once molten rock that makes up most new oceanic crust is a fairly magnetic substance and scientists began using magnetometers to measure the magnetism of the ocean floor in the 1950s what they discovered was that the magnetism of the ocean floor around. Continental shelf 300 feet continental slope 300 10 000 feet abyssal plain 10 000 feet abyssal hill 3 000 feet up from the abyssal plain seamount 6 000 feet.

The red colors are the youngest parts of the seafloor where fresh new crust is formed as lava seeps up from the deep interior of the earth at spreading ridges as new crust forms at these spreading ridges older crust colored green in the diagram moves away from. The mid ocean ridge curves like the seams of a baseball along the sea floor extending into all of earth s oceans. Ocean floor diagram worksheet answers. Seafloor spreading theory that oceanic crust forms along submarine mountain zones known collectively as the mid ocean ridge system and spreads out laterally away from them.