A. Introduction.- 1. Outline of the Theme and Statement of the Problem.- 2. On the History of Seawater.- 3. The Zechstein Salt Succession.- 4. The Minerals of Salt Deposits.- a) The Main Components (Salt Minerals sensu stricto).- b) Accessory and Authigenic Minerals.- B. The Stability Conditions of Salt Minerals.- The Graphic Presentation of Solubility Data.- I. System CaSO4-H2O (? NaCl, etc.).- 1. Solid Phases.- 2. Temperature Dependence.- 3. The Common Ion Effect (Excluding the Formation of Compounds).- 4. Pressure Dependence.- II. System NaCI-KC1-MgCl2-H2O.- 1. Solid Phases.- 2. Stability Conditions.- a) System NaCl-H2O.- b) System NaCl-KCl-H2O.- c) System NaCl-KCl-MgCl2-H2O.- ?) Isothermal Evaporation and Solution.- ?) Temperature Dependence.- ?) Salting Out.- III. System NaCl-KCl-Na2SO4-H2O.- 1. Further Solid Phases.- 2. Stability Conditions.- IV. System NaCl-Na2SO4 MgCl2-H2O.- 1. Further Solid Phases.- 2. Stability Conditions.- 3. Crystallization Sequence (Isothermal Evaporation).- 4. Temperature Dependence.- V. The Five-Component System NaCl-KCl-MgCl2-Na2SO4-H2O.- 1. Further Solid Phases.- 2. Stability Conditions.- a) Stable Equilibria.- b) Metastable Equilibria.- 3. Crystallization Sequence.- 4. Temperature Dependence.- VI. The Five-Component System with Ca and Fe Salts.- 1. Further Solid Phases.- a) With Ca Sulphates.- b) With Ca Chlorides.- c) With Fe Chlorides.- 2. Stability Conditions.- a) With Ca Sulphates.- b) With CaCl2.- c) With FeCl2.- C. Physico-chemical Models.- I. Primary Precipitation.- 1. Static Isothermal Evaporation of Normal Seawater at 25? C.- a) Stable Equilibria without Reaction in Constant Solutions.- b) Metastable Equilibria.- c) Conditions in Reactions along Reaction Lines and at Transition Points.- 2. Altered Seawater.- a) MgSO4 Deficient.- b) Formation of Polyhalite.- 3. Primary Precipitation with a Temperature Gradient.- 4. The Effect of Pressure.- II. Thermal Metamorphism.- 1. Generalities and Calculation.- Calculation.- 2. Examplel£®