Dendrite, Limestone, Solnhofen, Bavaria, Germany, wood engraving, published 1893 - stock illustration

Dendritic minerals (iron- and manganese oxides) on Solnhofen Limestone (Upper Jurassic of Southern Germany). In metallography and crystallography, dendrites are tree-like or shrub-like crystal structures. In geology, for example, they exist as crystallizations of iron and manganese oxides on rock surfaces. These are often confused with fossils of plant remains. Wood engraving, published in 1893.