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granodiorite |
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granodioriteMedium- to coarse-grained rock that is one of the most abundant intrusive rocks. It contains quartz and is distinguished from granite by having more plagioclase feldspar than orthoclase feldspar; its other mineral constituents include hornblende, biotite, and augite. Granodiorite is similar to granite in appearance but darker. granodiorite [¦gra·nō′dī·ə‚rīt] (petrology) A visibly crystalline plutonic rock composed chiefly of sodic plagioclase, alkali feldspar, quartz, and subordinate dark-colored minerals. 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 Leticia project historically produced gold from skarns along the contact of a limestone unit and a grandiorite intrusive. Agua Verde is a mineralized grandiorite stock with a well developed copper bearing skarn contact with host sedimentary rocks. Agua Verde is a mineralized grandiorite stock with a well developed copper bearing skarn contact with host sedimentary rocks. |
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