- of, pertaining to, containing, or resembling porphyry, its texture, or its structure.
Origin of porphyritic
Examples from the Web for porphyritic
Historical Examples of porphyritic
Long before this it existed as a slate and porphyritic line of hills.More Letters of Charles Darwin
In the main the lava is an andesite, and is very generally of a porphyritic structure.Mount Rainier
The soil, in fact, was bestrewn with quartz and porphyritic rocks.Five Weeks in a Balloon
Page 40: "porphorytic" changed to "porphyritic" (the greenstone is handsomely porphyritic).Western Scenes and Reminiscences
Henry Rowe Schoolcraft
From two to three feet of mighty greenstone penetrate these porphyritic rocks.Wanderings in Corsica, Vol. 1 of 2
- (of rocks) having large crystals in a fine groundmass of minerals
- consisting of porphyry
- An igneous rock containing the large crystals known as phenocrysts embedded in a fine-grained matrix.