Porphyritic Andesite
Jan. 12, 2025
Porphyritic Andesite | Geology 1501 | ECU Uses and How Porphyritic Andesite Rock Form | Science Drill Porphyritic andesite (Boulder County, Colorado, USA) | Flickr Porphyritic andesite, showing white phenocrysts of plagioclase and dark phenocrysts of amphibole | Geology rocks, Rocks and minerals, Rock collection | Porphyritic Andesite