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latite |
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latiteor trachyandesiteType of igneous rock that is abundant in western North America. Usually white, yellowish, pinkish, or gray, it is the volcanic equivalent of monzonite. Latites contain plagioclase feldspar (andesine or oligoclase) as large, single crystals (phenocrysts) in a fine-grained matrix of orthoclase feldspar and augite. latite [′lā‚tīt] (petrology) A not visibly crystalline rock of volcanic origin composed chiefly of sodic plagioclase and alkali feldspar with subordinate quantities of dark-colored minerals in a finely crystalline to glassy groundmass. 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 form and shape of zones of veinlets and brecciation is not yet well defined, but is hosted exclusively within the trachyandesite upper volcanic rocks. 55m of the favourable trachyandesite stratigraphy starting at 223m depth. Silver mineralization at Calcite Hill is predominantly hosted within the same trachyandesite volcanic rock and overlying mudstone which hosts mineralization at Galena Hill. |
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