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New study challenges mantle oxidation theory

New study challenges mantle oxidation theory

A thin slice of ancient rock taken from Gakkel Ridge near the North Pole, photographed under a microscope and viewed under cross-polarized light. Width of field ~14 mm. Thin-section rock analysis helps geologists identify and characterize the minerals in a rock. The analyses reveal information about the mineral composition, texture, and history of the rock,…

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Updated standings, highlights after matchday 3

Updated standings, highlights after matchday 3

On Monday, sports fans experienced another exciting day of Olympic competitions. The third day of competition after Friday’s opening ceremony featured group matches in women’s basketball, beach volleyball and water polo, as well as shooting, swimming, gymnastics and judo. The U.S. men’s gymnastics team also attempted to win its first medal since the 2008 Games…

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