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plutonic rock |
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plutonic rock [plü′tän·ik ′räk] (geology) A rock formed at considerable depth by crystallization of magma or by chemical alteration. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The NESP is characterized by a strong positive magnetic anomaly and consists of plutonic rocks mainly and sporadic supracrustal belts ranging in age from Eo- to Neoarchean. A new gold prospect was found in exposures of oxidized veins within intensely altered plutonic rocks along Quartz Creek at the north end of the claims. A new gold prospect at the north end of the claims yielded rock assays from 114 to 325 ppm over a distance of 1,700 feet along intensely altered and oxidized plutonic rock. |
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