https://exhibits.lafayette.edu/geology/files/original/834e43426f187ccbc320c1599c7db1dd.JPG
Media
Part of P197/P198: Hornblende-Andesite. Stenzelberg, Seven Mts., Rhenish-Prussia
Part of P197/P198: Hornblende-Andesite. Stenzelberg, Seven Mts., Rhenish-Prussia