Sea Floor Spreading Gis

Maps and other data gathered during the war allowed scientists to develop the seafloor spreading hypothesis this hypothesis traces oceanic crust from its origin at a mid ocean ridge to its destruction at a deep sea trench and is the mechanism for continental drift.

Sea floor spreading gis.

Channel islands images data. Columbia river mouth data. Sediment any solid material that has settled out of a state of suspension in liquid. Marie built her physiographic map of the atlantic ocean by assembling sparse echo sounder profiles collected aboard multiple expeditions.

Sea floor spreading n the process of adding to the earth s crust at mid ocean ridges as magma wells up and forces previously formed crust apart. Further he claimed that continents would be pushed aside by the same forces that cause the ocean to grow. World war ii gave scientists the tools to find the mechanism for continental drift that had eluded wegener. Seafloor spreading occurs along mid ocean ridges large mountain ranges rising from the ocean floor.

Students study the bathymetry of the south atlantic use magnetic reversals to interpret marine magnetic anomalies and calculate the rate of seafloor spreading. Deep sea basins washington oregon and california report and data. Tharp was a pioneer in science both as a woman and for her mapmaking. 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.

Spreading rates determine if the ridge is fast intermediate or slow. As an oceanographic cartographer marie tharp is credited with scientifically mapping the ocean floor in partnership with her colleague bruce heezen. Seafloor spreading theory that oceanic crust forms along submarine mountain zones and spreads out laterally away from them. Tharp and heezen s work was revolutionary in that led to many discoveries and the theories of continental drift of plate tectonics.

He suggested that new sea floor forms at the oceanic ridges and spread outwards from the line of origin. The concept of sea floor spreading. Spreading rate is the rate at which an ocean basin widens due to seafloor spreading. This activity takes place in a laboratory setting and requires 1 5 2 hours to complete.

Crater lake images data movie poster cd rom. The concept of seafloor spreading was put forward by h harry hess an american geologist. Sea floor spreading the process that occurs at mid ocean ridges in which convection currents below pull the plates apart and create new sea floor. California seafloor mapping program central oregon data.

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.