https://exhibits.lafayette.edu/geology/files/original/f0af3a7aa1dd64b4358238dbaff685d1.JPG
Media
Part of P197/P198: Hornblende-Andesite. Stenzelberg, Seven Mts., Rhenish-Prussia
Part of P197/P198: Hornblende-Andesite. Stenzelberg, Seven Mts., Rhenish-Prussia