Groundmass definitions

Groundmass

1) Base for natural crystals 2) Igneous rock
Found on https://www.crosswordclues.com/clue/groundmass

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groundmass

(from the article `matrix`) ...and the like, or the fine-grained materials that surround larger grains in a rock—e.g., silt and clay particles in a sandstone or tiny crystals in ...
Found on http://www.britannica.com/eb/a-z/g/74

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Groundmass

The matrix of relatively fine-grained material between the phenocrysts in a porphyritic rock.
Found on http://www.evcforum.net/WebPages/Glossary_Geology.html

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groundmass

[n] - the matrix of fine-grained crystalline material in which larger crystals are embedded
Found on http://www.webdictionary.co.uk/definition.php?query=groundmass

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groundmass

see porphyry.
Found on https://www.encyclo.co.uk/local/20132

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