https://exhibits.lafayette.edu/geology/files/original/6d01ddceb4db01c1808ed1100c39335e.JPG
Media
Part of P197/P198: Hornblende-Andesite. Stenzelberg, Seven Mts., Rhenish-Prussia
Part of P197/P198: Hornblende-Andesite. Stenzelberg, Seven Mts., Rhenish-Prussia