Sediment Varves

$5.00

An introductory field investigation of redox features and laminations (varves) observed in soil polygons formed by surface soil crusting and cracking processes associated with shallow inundation.

Features observed include:

  • A black ferrous sulfide reduced matrix
  • Gray and rusty “mottle” colors associated with FeS oxidation
  • Sediment and/or cyanobacterial varves