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Graphic granite in thin section

Graphic granite in thin section

C021/0304

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Credit

DIRK WIERSMA / SCIENCE PHOTO LIBRARY DIRK WIERSMA / SCIENCE PHOTO LIBRARY

Caption

Granite is formed at great depth, by the solidification of magma. Graphic granite is a particular variety, in which the two essential rock forming minerals, quartz and feldspar, have solidified eutectically (= simultaneously). This results in an orderly pattern: the quartz solidifies in the shape of hieroglyphs, which are embedded in a matrix of patchy, mono-crystalline feldspar. These characteristics come out well in the thin section here photographed in polarised, transient light. Actual size is 27 x 35 mm.

Release details

Model release not required. Property release not required.

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