The deepest regions of Earth's oceans, known as the abyssal and hadal zones, lie at least as far under the water's surface as ...

It is found in the depths of Indian Ocean and named as the gravity hole or Indian Ocean geoid low, an anomaly where gravity ...

Whether convection in the Earth's mantle extends through its entire depth or if the mantle is layered ... of trace elements may exist in a 'magma ocean' that has always existed above the core ...