Augen gneiss 2
Forfatter/Opretter:
James St. John
Attribution:
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Shortlink:
kilde:
størrelse:
3008 x 2000 Pixel (6092942 Bytes)
beskrivelse:
(CMNH 12375, Cleveland Museum of Natural History, Cleveland, Ohio, USA)
Gneiss is a high-grade, foliated metamorphic rock. It forms principally by metamorphism of schist, granite, or granite-like rocks. The foliation in gneiss is obvious and consists of alternating bands of light and dark minerals. The light-colored component is usually quartz (SiO2). Notice the discrete, elongated to ellipsoidal masses of light-colored material in this specimen. Gneiss having such mineral masses is called "augen gneiss" ("augen" is German for "eyes").
Locality: unrecorded/undisclosed
Licens:
Licensbetingelser:
Creative Commons Attribution 2.0
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