Science news articles about 'volcanic glasses'

Geologists studying deposits of volcanic glass in the western United States have found that the central Sierra Nevada largely attained its present elevation 12 million years ago, roughly 8 or 9 ...

... igneous rock and live in the obsidian-like volcanic glass. They first identified the bacteria through ... surface in Hawaii that they reached by drilling through the solid volcanic rock base of Mauna Kea ...

... – afterward by volatiles introduced from the outside, such as with meteorites." The researchers this summer will study volcanic glasses gathered from other Apollo missions for evidence of water.

... minerals found at the site include malachite from south of the Dead Sea, obsidian (natural volcanic glass) from central Anatolia, and a votive axe on serpentine from either Cyprus or northern Syria. ...

... of Washington and the Smithsonian Institution have found the origin of 131 flakes of obsidian, a volcanic glass. These small flakes were discarded after stone tools were made from obsidian and were ...

... University of Washington and the Smithsonian Institution have found the origin of 131 flakes of obsidian, a volcanic glass. These small flakes were discarded after stone tools were made from obsidian ...