Sulphur Cycle - Nutrient Cycles
The sulphur cycle is mostly sedimentary except for a short gaseous phase. The large reservoir of sulphur is in the soil and sediment where it is tied up in organic (coal, oil and peat) and inorganic deposits (pyrite rock and sulphur). It is released by weathering of rocks erosional runoff and decomposition of organic matter, and is carried to terrestrial and aquatic ecosystems in salt solution.
The smaller reservoir is in the atmosphere. Sulphur can circulate on a global scale along with carbon oxygen and nitrogen because of its gaseous phase.