Expositions of Holy Scripture

Earth''s outer crustGeologistsTime and rock unitsGeologic mapWhat are rocks and minerals?Chemical elementsMineralsRocksIgneous rocksExtrusive or volcanic igneous rocksIntrusive igneous rocksSedimentary rocksSoilsSedimentary rock materials in broken fragmentsSedimentary rock materials in solutionCementing materials and chemical sedimentsSedimentary rocks formed by plants and animalsMetamorphic rocksStatic metamorphismContact metamorphismDynamic metamorphismOccurrence and properties of mineralsHow minerals occurCrystalline mineralsCrystalsImperfect crystalsAmorphous mineralsSome distinguishing properties of mineralsColorLusterTransmission of lightHardnessStreak or powderCleavagePartingFractureSpecific gravityEffervescence in acidSome special occurrences of mineralsCave depositsConcretionsGeodesPetrified woodCollecting rocks and mineralsRock and mineral identification chartsHow to use the mineral identification chartsKey to mineral identification chartsMineral identification chartsHow to use the rock identification chartsRock identification chartsDescriptions of some Texas rocks and mineralsAnhydriteAsbestosBariteBasaltCalciteCassiteriteCelestiteCinnabarClayCopper minerals (chalcocite chalcopyrite malachite azurite)DolomiteFeldsparFluoriteGalenaGarnetGneissGoldGraniteGraphiteGypsumHaliteHematiteLimestoneLimoniteLlaniteMagnetiteManganese minerals (braunite hollandite pyrolusite)MarbleMicaObsidian and vitrophyreOpalPegmatitePyriteQuartzQuartziteRhyoliteSand and sandstoneSchistSerpentineShaleSilver minerals (argentite cerargyrite native silver)SulfurTalc and soapstoneTopazTourmalineUranium minerals (carnotite uranophane pitchblende)Volcanic ash (pumicite)Composition hardness and specific gravity of some Texas mineralsBooks about rocks and mineralsNontechnical books for beginnersTextbooks and other reference booksSelected references on Texas rocks and minerals