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Metavolcanic rock
In geology, metavolcanic rock is a type of metamorphic rock. Such a rock was first produced by a volcano, either as lava or tephra. Then, the rock was buried underneath subsequent rock and was subjected to high pressures and temperatures, causing the rock to recrystallize. Metavolcanic rock is commonly found in greenstone belts.

Metavolcanic rock can contain the minerals quartz, feldspar, amphibole, pyroxene. Less common minerals can include biotite, garnet, actinolite, epidote, chalcedony, prehnite, and wodginite.

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Everock Inc., announces an option agreement for the Tudor Gold property situated in the historic Madoc gold region of Eastern Ontario.
Mar 24, 2006; M2 PRESSWIRE-24 March 2006-Closing Bell Online: Everock Inc., announces an option agreement for the Tudor Gold property situated...
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Age and evolution of late Mesozoic metamorphic core complexes in southern Siberia and northern Mongolia
Jan 01, 2008; Abstract: Numeros Cretaceous metamorphic core complexes (MCCs) extend from Transbaikalia in Russia to northern Mongolia within...
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A new source of gem-quality cordierite and corundum in the Laramie Range of southeastern Wyoming.
Sep 01, 2002; In 1995 field reconnaissance in the central Laramie Range of southeastern Wyoming led to the discovery of a new source of gem-...
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Channel Sampling Confirms High Grade Gold Mineralization on Namex's Golden Pine Property.
Sep 14, 2005; MONTREAL, QUEBEC, Sep 14, 2005 (CCNMatthews via COMTEX) -- Namex Explorations Inc. (TSX VENTURE:NME) is pleased to provide an...
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Extensive Gold, Copper & Zinc Geochem Anomalies Identified on the Center Zone at Mengold's Goldcreek Property.
Mar 03, 2008; MONTREAL, QUEBEC, Mar 3, 2008 (Marketwire via COMTEX) -- Mengold Resources Inc. (TSX VENTURE:MNI) is pleased to announce the...
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