The mid-ocean ridge is entirely volcanic and is composed of basaltic lavas characteristic of the oceanic crust.
Magnetite grains are oriented parallel to the earth's surface at the magnetic equator, oblique to the earth's surface at the Tropic of Cancer, and pointing straight down (perpendicular to the earth's surface) at magnetic north. Pole.
Mantle clouds form at the core-mantle boundary. They are long-lived structures and hot plumes are relatively buoyant and rise to the surface.
Mid-ocean ridges occur along diverging plate boundaries where new ocean floors form as the Earth's tectonic plates spread. When the plates separate, lava rises to the seafloor, and huge volcanic eruptions of basalt occur.
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