https://exhibits.lafayette.edu/geology/files/original/fc6ee982d6e43578a1fdc1a62cb5a607.JPG
Media
Part of P197/P198: Hornblende-Andesite. Stenzelberg, Seven Mts., Rhenish-Prussia
Part of P197/P198: Hornblende-Andesite. Stenzelberg, Seven Mts., Rhenish-Prussia