CHAPTER V. WATER AS A MINERAL RESOURCE 67

GENERAL GEOLOGIC RELATIONS 67

DISTRIBUTION OF UNDERGROUND WATER 68

MOVEMENT OF UNDERGROUND WATER 71

WELLS AND SPRINGS 72

COMPOSITION OF UNDERGROUND WATERS 73

RELATION OF GEOLOGY TO UNDERGROUND WATER SUPPLY 75

SURFACE WATER SUPPLIES 76

UNDERGROUND AND SURFACE WATERS IN RELATION TO EXCAVATION AND CONSTRUCTION 78