Granoblastic

Granoblastic is an adjective describing an anhedral phaneritic equi-granular metamorphic rock texture. Granoblastic texture is typical of quartzite, marble, charnockites and other non-foliated metamorphic rocks without porphyroblasts. Characteristics defining granoblastic texture include: grains visible to the unaided eye, sutured boundaries, and approximately equidimensional grains. The grain boundaries intersect at 120° triple junctions under ideal conditions.

A rock that has a granoblastic texture can be termed a granofels.

References

  • [https://web.archive.org/web/20080420104653/http://www.maden.hacettepe.edu.tr/dmmrt/index.html Dictionary of Mining, Mineral, and Related Terms]
  • [https://web.archive.org/web/20061003141530/http://teachserv.earth.ox.ac.uk/courses/es2-metrock/tex/1tex02.html Metamorphic Microstructures]

Category:Metamorphic rocks

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