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picrite

   Also found in: Encyclopedia, Wikipedia 0.01 sec.
picrite [ˈpɪkraɪt]
n
(Earth Sciences / Geological Science) a coarse-grained ultrabasic igneous rock consisting of olivine and augite with small amounts of plagioclase feldspar


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These rocks contain more than 18 wt% MgO (Le Bas 2000) and are distinguished from other magnesium-rich rocks, such as picrites and meimechites, by having spinifex texture (characterized by spectacular arrays of subparallel or randomly-oriented skeletal, platy and bladed olivine crystals set in a glassy groundmass; Fig.
The PicRite system is one of the foremost tools in the world for improving high unit volume inventory management.
 
 
 
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