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PREFERRED TERM
anorthositic rock  
TYPE
  • http://purl.org/net/provenance/ns#DataItem

DEFINITION
  • Leucocratic phaneritic crystalline igneous rock consisting essentially of plagioclase, often with small amounts of pyroxene. By definition, colour index M is less than 10, and plagiclase to total feldspar ratio is greater than 0.9. Less than 20 percent quartz and less than 10 percent feldspathoid in the QAPF fraction. QAPF field 10, 10*, and 10'.
DESCRIPTION
  • Leucocratic phaneritic crystalline igneous rock consisting essentially of plagioclase, often with small amounts of pyroxene. By definition, colour index M is less than 10, and plagiclase to total feldspar ratio is greater than 0.9. Less than 20 percent quartz and less than 10 percent feldspathoid in the QAPF fraction. QAPF field 10, 10*, and 10'.
IDENTIFIER
  • anorthositicRock
TITLE
  • anorthositic rock
URI
http://inspire.ec.europa.eu/codelist/LithologyValue/anorthositicRock
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