Sea Floor Spreading For Gilrs

Seafloor spreading happens at the bottom of an ocean as tectonic plates move apart.

Sea floor spreading for gilrs. Seafloor spreading theory that oceanic crust forms along submarine mountain zones and spreads out laterally away from them. Subduction and sea floor spreading are processes that could alter the size and form of the ocean. The seafloor moves and carries continents with it. The motivating force for seafloor spreading ridges is tectonic plate pull rather than magma pressure although there is typically significant magma activity at spreading ridges.

But tharp s discovery of the 10 000 mile long mid atlantic ridge a find that showed that the sea floor was spreading was initially dismissed as girl talk related content. Due to this continuous seafloor spreading occurs and makes atlantic ocean floor to be connected to other continental crust making the ocean gets wider over the time. This video goes over the process of sea floor spreading and the evidence that supports this theory. Spreading rates determine if the ridge is fast intermediate or slow.

Sea floor spreading earth science post module 2 middle school page 3 the youngest rock will always be closest to the ridge area and the oldest will be on the outside closest to the continents. The mid atlantic ridge for instance separates the north american plate from the eurasian plate and the south american plate from the african plate the east pacific rise is a mid ocean ridge that runs through the eastern pacific ocean and separates the pacific plate from the north american. Seafloor spreading occurs along mid ocean ridges large mountain ranges rising from the ocean floor. Some of the worksheets for this concept are sea floor spreading work sea floor spreading a model of seafloor spreading inside earth work magnetic reversals activity name date sea floor spreading l 1 2 3 5 4 ovr l lesson 3 seafloor profiling seafloor spreading and subduction.

Spreading rate is the rate at which an ocean basin widens due to seafloor spreading. For instance the atlantic ocean is believed to be expanding because of its few trenches. 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. The older rock is close to 400 million years.

Learn more about sea floor spreading and how it works with this demo. 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.