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Reiche Zeche Mine Students check drill cores in the teaching and research mine
BRK25A92_201

Reiche Zeche Mine Students check drill cores in th...

Reiche Zeche Mine Students check drill cores in the teaching and research mine
BRK24F05_422

Reiche Zeche Mine Students check drill cores in th...

Drill core of a test borehole on a black fallow
BRK23A51_034

Drill core of a test borehole on a black fallow

Drill core of a test borehole on a black fallow
BRK23A51_022

Drill core of a test borehole on a black fallow