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leucocratic

   Also found in: Encyclopedia 0.01 sec.
leucocratic [ˌluːkəˈkrætɪk]
adj
(Earth Sciences / Geological Science) (of igneous rocks) light-coloured because of a low content of ferromagnesian minerals
[from German leukokrat, from leuco- + Greek kratein to rule]


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Anil points out that "Webster's 2nd defines pilandite as 'a leucocratic porphyry with phenocrysts, a groundmass of anorthoclase, and a little amphibole" and adds "Well at least I know what 'a', 'with', 'of', 'and', and 'little' mean.
E[acute accent]The rock samples collected can be subdivided in the following categories: - Quartz boulder trains : 70% - Leucocratic to melanocratic gneiss boulder trains : 10% - Quartz veins in outcrops : 11% - Leucocratic to melanocratic gneiss outcrops : 8% E[acute accent]Results of this first phase exploration are pending and will be released as soon as they are available.
 
 
 
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