Clearly visible coal seam in Dünkelberg Quarry, Muttental, NRW, Germany.

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Size: 4288px × 2848px
Location: Muttental, Witten, NRW, Germany.
Photo credit: © David Davies / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: coal, duenkelberg, europe, geology, german, germany, historic, history, industry, museum, muttental, nachtigall, nightingale, north, nrw, quarry, rhine-westphalia, rocks, ruhr, ruhrgebiet, seam, sightseeing, visitors, witten, ünkelberg