Iron films, acid mine drainage, natural science, and more.
Járnbrák is an icelandic term that refers to a natural biogeochemical phenomenon also known as a "floating iron-rich film" or just an "iron film".
Iron films are a distinctive feature common to wetlands, seeps, and still areas of rivers and lakes. Though commonly mistaken for gasoline or oil pollution due to their coloration, iron films are naturally occurring, and are largely thought to be a consequence of iron-oxidizing microbes such as Leptothrix discophora . Also known as floating iron, iron-bearing films, Schwimmeisen (German), or Járnbrák (Icelandic), these films are all at once ubiquitous (found all over the world), visually striking, and poten