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latite
(redirected from Trachyandesite)

   Also found in: Wikipedia 0.01 sec.

latite

 or trachyandesite

Type 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.


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5 wt %) trachyandesite that occurs in continental rift, collisional and arc settings (Rogers and Setterfield 1994).
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.
 
 
 
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