https://exhibits.lafayette.edu/geology/files/original/7910b7c7000309f90b890993a306b777.JPG
Media
Part of P197/P198: Hornblende-Andesite. Stenzelberg, Seven Mts., Rhenish-Prussia
Part of P197/P198: Hornblende-Andesite. Stenzelberg, Seven Mts., Rhenish-Prussia