phenotype
aphanitic igneous rock which is identified and classified according to the mineralogy of its phenocrysts, when it is impossible to determine the mineralogy of the groundmass
en-US/ˈfinəˌtaɪp/
en-GB/ˈfɛnəˌtaɪp/
aphanitic igneous rock which is identified and classified according to the mineralogy of its phenocrysts, when it is impossible to determine the mineralogy of the groundmass