https://exhibits.lafayette.edu/geology/files/original/8dde258c7aea86b9a7c430e4316a44df.jpeg
Media
Part of P197/P198: Hornblende-Andesite. Stenzelberg, Seven Mts., Rhenish-Prussia
Part of P197/P198: Hornblende-Andesite. Stenzelberg, Seven Mts., Rhenish-Prussia