Tag Archives: Earth’s Mantle

A 2013 photo of an erupting undersea volcano creating a new island off the coast of Nishinoshima, Japan. The future Hawaiian island of Loihi will resemble this in geological terms.
~100,000-200,000: Exploring Loihi – The Emerging Hawaiian Island

Discover Loihi, an undersea mountain set to become Hawaii's newest island. With a history of seismic activity and significant growth potential, Loihi epitomizes Earth's dynamic geological processes

Green sand, composed of olivine mineral grains, found on a volcanic beach on the island of Hawaii.
1789: Olivine – The Earth’s Mantle’s Gem

Olivine, an abundant magnesium-iron silicate in the Earth's mantle, is key to understanding planetary structures. Its polymorphism and occurrence in volcanic areas, as well as in lunar, Martian, and meteoritic rocks, make it integral to [...]