Table of Contents
What will happen to the hot less dense material called magma during convection current?
As tectonic plates slowly move away from each other, heat from the mantle’s convection currents makes the crust more plastic and less dense. Hot magma fueled by mantle convection bubbles up to fill these fractures and spills onto the crust. This bubbled-up magma is cooled by frigid seawater to form igneous rock.
What force causes mid-ocean ridges?
A mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. This uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.
What does hot material do at mid-ocean ridges?
The mid-ocean ridges provide geologists with a window to the interior of the Earth. The ridges form when mantle material melts, rises into the cracks between tectonic plates, and solidifies again. This excess molten rock can be caused by very hot temperatures in the mantle.
What force that acts on the new raised seafloor around mid-ocean ridges?
gravitational sliding
Ridge push (also known as gravitational sliding) or sliding plate force is a proposed driving force for plate motion in plate tectonics that occurs at mid-ocean ridges as the result of the rigid lithosphere sliding down the hot, raised asthenosphere below mid-ocean ridges.
What happens as magma rises through mid-ocean ridges?
Beneath a typical mid-ocean ridge, mantle material partially melts as it rises in response to reduced pressure. This melted rock, or “magma”, may collect in a reservoir a few kilometers below the seafloor, awaiting eruption. When magma pressure builds up enough to force its way out to the seafloor, eruption occurs.
What are the characteristics of mid-ocean ridges?
A mid-ocean ridge (MOR) is a seafloor mountain system formed by plate tectonics. It typically has a depth of ~ 2,600 meters (8,500 ft) and rises about two kilometers above the deepest portion of an ocean basin. This feature is where seafloor spreading takes place along a divergent plate boundary.