Seafloor spreading, or seafloor spread, is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge.

2023年11月29日 · Seafloor spreading is a geologic process in which tectonic plates —large slabs of Earth's lithosphere —split apart from each other. Seafloor spreading and other tectonic activity processes are the result of mantle convection. Mantle convection is …

seafloor spreading, theory that oceanic crust forms along submarine mountain zones, known collectively as the mid-ocean ridge system, and spreads out laterally away from them.

Seafloor spreading is a geologic process where there is a gradual addition of new oceanic crust in the ocean floor through a volcanic activity while moving the older rocks away from the mid-oceanic ridge.

2025年1月14日 · Seafloor-spreading rates are much more rapid in the Pacific Ocean than in the Atlantic and Indian oceans. At spreading rates of about 15 cm (6 inches) per year, the entire crust beneath the Pacific Ocean (about 15,000 km [9,300 miles] wide) could be …

2024年1月17日 · Seafloor spreading is an amazing natural process that happens deep in the ocean. It's all about the creation of new oceanic crust at places called mid-ocean ridges. This constant formation of the fresh crust is like Earth's way of making new skin.

2023年3月21日 · Seafloor spreading occurs at divergent boundaries where the tectonic plates move away from each other, resulting in the formation of new seafloor. These divergent boundaries are usually found between oceanic plates as mid-ocean ridges.

Seafloor spreading is the mechanism for Wegener’s drifting continents. Convection currents within the mantle take the continents on a conveyor-belt ride of oceanic crust that over millions of years takes them around the planet’s surface.

Seafloor Spreading is the usual process at work at divergent plate boundaries, leading to the creation of new ocean floor. As two tectonic plates slowly separate, molten material rises up from within the mantle to fill the opening.

2024年10月11日 · Seafloor spreading happens when volcanic eruptions at mid-ocean ridges cause the oceanic crust to crack. New lava fills these cracks, pushing the crust apart on either side. At subduction zones, oceanic crust sinks beneath continents or other oceanic plates and returns to the mantle.