DR JUERG ALEAN / SCIENCE PHOTO LIBRARY DR JUERG ALEAN / SCIENCE PHOTO LIBRARY
Manganese-iron dendrites in limestone from the Randen mountains near Schaffhausen, Switzerland. The yellow mineral is limonite. Although such dendrites look like fossils, they are inorganic, caused by leaching of minerals into a rock fissure. Total image width about 2 centimetres.
Model release not required. Property release not required.