Sulfur Cycle

volcanic activity

extraction and combustion of sulfur releases it into atmosphere

amino acids and proteins

essential for proteins found in plants, contributes to function

weathering and deposition

rock exposed to the elements, sulfur is released, taken in by plant roots, lichens, burrowing animals

lithification

unconsolidated material (sand, salt, mud) is converted into solid rock

mining

sulfide containing minerals exposed

acid mine drainage

sulfur runoff

human impact

burning fossil fuels and mining adds sulfur dioxide to atmosphere and causes acid rain

major sink

ocean, sedimentary rocks