WebApr 1, 2010 · As the plates move, new sea floor can be created. The plates form three different kinds of boundaries: convergent, divergent, and transform. Convergent boundaries are also called collision boundaries because they are areas where two plates collide. At transform boundaries, the plates slide and grind past one another. Seafloor spreading helps explain continental drift in the theory of plate tectonics. When oceanic plates diverge, tensional stress causes fractures to occur in the lithosphere. The motivating force for seafloor spreading ridges is tectonic plate slab pull at subduction zones, rather than magma pressure, although there is typically significant magma activity at spreading ridges. Plates that are not subducting are driven by gravity sliding off the elevated mid-ocean ridges a process called rid…
What Forms in Divergent Boundaries? Sciencing
WebWhen molten material erupts through the mid ocean ridge called sea-floor spreading What happens to the rock along the ridge when new molten material erupts? The older rock … WebNov 23, 2010 · Hardens to form new rock at mid-ocean ridges? Sea- Floor Spreading molten material erupts through the valley that runs along the center of some mid-ocean ridges. … css publisher
Developing the theory [This Dynamic Earth, USGS]
WebDec 15, 2014 · Study now. See answer (1) Best Answer. Copy. New rock is added to the ocean floor by the process of seafloor spreading, in which the magma is pushed out of the mantle, and is cooled by the water ... WebApr 15, 2024 · How is new ocean floor and oceanic crust formed? This process occurs when oceanic crust is pushed back into the mantle at subduction zones. As old oceanic crust is subducted and melted into magma, new oceanic crust in the form of igneous rock is formed at mid-ocean ridges and volcanic hotspots. What does the oceanic crust look like? WebApr 26, 2012 · Scientists have thought that magmas that form new crust at fast-spreading ridges rise up from the depths, quickly crystallize, and then push away from the ridge to form new ocean floor. cssps voucher purchase