Sea Floor Spreading For Gilrs

For instance the atlantic ocean is believed to be expanding because of its few trenches.

Sea floor spreading for gilrs.

Spreading rate is the rate at which an ocean basin widens due to seafloor spreading. 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 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. At ridges in the middle of oceans new oceanic crust is created.

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. Seafloor spreading happens at the bottom of an ocean as tectonic plates move apart. Spreading rates determine if the ridge is fast intermediate or slow. Learn more about sea floor spreading and how it works with this demo.

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. 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. Subduction and sea floor spreading are processes that could alter the size and form of the ocean. Displaying top 8 worksheets found for activity seafloor spreading.

Free background music no copyright music brvtvs dead times freebackgroundmusic webs. 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. Seafloor spreading theory that oceanic crust forms along submarine mountain zones and spreads out laterally away from them. The older rock is close to 400 million years.

Seafloor spreading occurs along mid ocean ridges large mountain ranges rising from the ocean floor. 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.