Porphyritic-Aphanitic
A porphyritic-Aphanitic texture is defined as a rock having an aphanitic groundmass, or matrix, in which embedded phenocrysts make up more than 10% of the total rock volume. The phenocrysts are visible to the unaided eye. If phenocrysts are abundant, the rock may appear initially to be phaneritic. Careful observation of the area between the phenocrysts will indicate if there is in fact aphanitic matrix.