In this model, based on done surveyed on evaporate formations for evaporates sedimentation in deep waters several stages has occurred consequently, according to schmaltz.
In Schmalz theory, following stages are occurred respectively:
A- Formative stage
In this stage, density of basin is increased due to evaporate and non-evaporate salts are precipitated.
B- Euxinic stage
Evaporation it more than water flow amount into basin by density increase, salt is aggregated in suitable depth and it prevents from permanence in oxygen remaining.
C- Ephemeral stage
By evaporation subsequently, water is very concentrated and gypsum crystal is created especially in superficial parts far from center.
A- Permanent evaporative stage
By subsequent evaporation, depths in basin are saturated and gypsum with anhydride is precipitated in bottom.
B- Terminal stage
If disruption or fracturing is, occurred in a basin or basin is filled by evaporates and or finally weather condition is changed and evaporate conditions reaches to desert. In this stage, there is reducing conditions it the bottom of basin. Sapropel facieses (Black shale, anaerobic with fundamental metals) or usual marine organisms are deposited as fresh water plankton in the basin.