marmor_01 (IMAGE)

Johannes Gutenberg Universitaet Mainz

marmor_01

Caption

Marmor aus Namibia: Ausgehend von einer Spalte, die mit weißem Kalziumkarbonat gefüllt ist, sind Röhrchen in paralleler Anordnung nach unten gewachsen.

Credit

Foto/©: Cees Passchier

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