any igneous rock with large crystals embedded in a finer groundmass of minerals
2. obsolete
a reddish-purple rock consisting of large crystals of feldspar in a finer groundmass of feldspar, hornblende, etc
Word origin
C14 porfurie, from Late Latin porphyrītēs, from Greek porphuritēs (lithos) purple (stone), from porphuros purple
Examples of 'porphyries' in a sentence
porphyries
The porphyries are represented by biotite-rich andesites, hornblende-rich andesite and dacite.
Yener Eyuboglu, M. Santosh, Francis O. Dudas, Enver Akaryalı, Sun-Lin Chung, KemalAkdağ, Osman Bektaş 2013, 'The nature of transition from adakitic to non-adakitic magmatism in a slab windowsetting: A synthesis from the eastern Pontides, NE Turkey', Geoscience Frontiershttp://www.sciencedirect.com/science/article/pii/S1674987112001259. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The adakitic lithologies comprise porphyries and hyaloclastites.
Yener Eyuboglu, M. Santosh, Francis O. Dudas, Enver Akaryalı, Sun-Lin Chung, KemalAkdağ, Osman Bektaş 2013, 'The nature of transition from adakitic to non-adakitic magmatism in a slab windowsetting: A synthesis from the eastern Pontides, NE Turkey', Geoscience Frontiershttp://www.sciencedirect.com/science/article/pii/S1674987112001259. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)