by Martin Reiser, University of Innsbruck, Innsbruck, Austria

Beautifully oxidised and eroded layers in a limestone, ressembling patterns of a geological map.
This photo was taken during a fieldtrip in Albania. The colors in the picture are just as they were in the outcrop and the visible part of the rock from bottom left corner to top right is about 35cm in length. Look at the full resolution picture for better colors.

Featured on GeoLog, the official blog of the European Geosciences Union