Atlantis Massif
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The Atlantis Massif is a prominent undersea massif in the North Atlantic Ocean. It is a dome-shaped region approximately 10 miles across and rising about 14,000 feet from the sea floor. It is located
The seafloor of the Atlantis Massif, showing white corals and an apparent spotted fish
Earth's mantle
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Earth's mantle is a layer of silicate rock between the crust and the outer core. It has a mass of 4.01×1024 kg and makes up 86% of the mass of Earth. It has a thickness of 2,900 kilometers making up a
Atlantis Massif
…indicated that it is not composed of the black basalt typical of the ocean floor but rather of dense green peridotite, which is usually found in the mantle. The central dome is corrugated and striated in a way that is representative of an exposed ultramafic oceanic core complex. An expedition to the area…
Green xenoliths of peridotite from the mantle are surrounded by black volcanic lava. These peridotite xenoliths were carried upward from the mantle by molten magma during a volcanic eruption in Arizona.