NAMES 31 MINERAL DEPOSITS AS MAGMATIC SEGREGATIONS IN IGNEOUS ROCKS 34 MINERAL DEPOSITS WITHIN AND ADJACENT TO IGNEOUS ROCKS, WHICH WERE FORMED IMMEDIATELY AFTER THE COOLING AND CRYSTALLIZATION OF THE MAGMAS THROUGH THE AGENCY OF HOT MAGMATIC SOLUTIONS 36 Evidence of igneous source 37 Possible influence of meteoric waters in deposition of ores of this class 41 Zonal arrangement of minerals related to igneous rocks 42 The relation of contact metamorphism to ore bodies of the foregoing class 45 SECONDARY CONCENTRATION IN PLACE OF THE FOREGOING CLASSES OF MINERAL DEPOSITS THROUGH THE AGENCY OF SURFACE SOLUTIONS 46 RESIDUAL MINERAL DEPOSITS FORMED BY THE WEATHERING OF IGNEOUS ROCKS IN PLACE 50 MINERAL DEPOSITS FORMED DIRECTLY AS PLACERS AND SEDIMENTS 51 Mechanically deposited minerals 51 Chemically and organically deposited minerals 52 SEDIMENTARY MINERAL DEPOSITS WHICH HAVE REQUIRED FURTHER CONCENTRATION TO MAKE THEM COMMERCIALLY AVAILABLE 54 ANAMORPHISM OF MINERAL DEPOSITS 57 CONCLUSION 58 CHAPTER IV. MINERAL RESOURCES--SOME GENERAL QUANTITATIVE CONSIDERATIONS 60 WORLD ANNUAL PRODUCTION OF MINERALS IN SHORT TONS 60 WORLD ANNUAL PRODUCTION OF MINERALS IN TERMS OF VALUE 62 SIGNIFICANCE OF GEOGRAPHIC DISTRIBUTION OF MINERAL PRODUCTION 63 THE INCREASING RATE OF PRODUCTION 63 CAPITAL VALUE OF WORLD MINERAL RESERVES 64 POLITICAL AND COMMERCIAL CONTROL OF MINERAL RESOURCES 65 RESERVES OF MINERAL RESOURCES 65 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