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Definition of inclusion

i. Any size fragment of another rock enclosed in an igneous rock.

Synonym of: xenolith

ii. A particle of nonmetallic material retained in a solid metal or alloy. Such inclusions are generally oxides, sulfides, or silicates of the host metal, but may also be particles of refractory materials picked up from a furnace or ladle lining.

iii. A crystal, aggregate, or minute cavity filled with one or two fluid phases and with or without a crystal phase enclosed in a host crystal.



See also: fluid inclusion, three-phase inclusion, negative crystal.


Mineral and/or Locality  
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