New Sea Floor Forms At What Type Of Boundary

The sinking land forms a rift valley that with water from streams and rivers eventually forms a long lake.

New sea floor forms at what type of boundary. They move on average 1 2 cm away from another each year. This sea is the first formation of a new ocean. Sea floor spreading is caused by convection currents in the mantle to cause a divergent boundary underwater. During the opening of the atlantic ocean sea level was so high that a western interior seaway formed across north america from the gulf of mexico to the arctic ocean.

If the rift drops below sea level it fills with ocean water and becomes a sea. Since the new oceanic basins are shallower than the old oceanic basins the total capacity of the world s ocean basins decreases during times of active sea floor spreading. As the plates move new sea floor can be created. Convergent divergent and transform.

In the athlantic ocean the north american plate is moving away form the eurasian plate causing a huge trench in the ocean. When two plates come together it is known as a convergent boundary. Transform boundaries are faults that connect two areas where plates are converging or diverging. Along these boundaries earthquakes are common and magma molten rock rises from the earth s mantle to the surface solidifying to create new oceanic crust.

Where plates diverge from each other molten magma flows upward between the plates forming mid ocean ridges underwater volcanoes hydrothermal vents and new ocean floor crust. A divergent boundary occurs when two tectonic plates move away from each other. The edges of these continental boundaries usually form zig zag patterns. 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.

The magnetism of mid ocean ridges helped scientists first identify the process of seafloor spreading in the early 20th century. The red sea was formed by diverging boundaries and is the beginning of what will eventually be part of the ocean. The plates form three different kinds of boundaries. At transform boundaries the plates slide and grind past one another.

When the divergent boundary spreads it caues a mid ocean ridge.