RocksRock climbersEl CapitanYosemite mapRock typesThe rock cycleRock cycle Basaltic lava splashbasalt Rhyolite: Fine-grained igneous textureScoria: basaltCoarse-grained igneous texture Porphyritic igneous texturePorphyritic Andesite Porphyritic graniteObsidian exhibits a glassy texturepumiceClassification of igneous rocksMagma typesMagma componentsGraniterhyoliteClassification of igneous rocksbasaltgabbroClassification of igneous rocksandesiteHornblende phenocrysts in andesitePorphyritic Andesite Porphyritic andesitedioriteBowen’s Reaction SeriesSedimentary rock outcropsSediment depositionSedimentary rockSedimentary classificationsandstoneWhite cliffs of DoverfossilsDessication cracksRipple marksBefore deformationGranite and gneissSlateMarbleFolded rockMetamorphic deformationFold in metamorphic rockConvergent plate boundaryOceanic basin tectonicsPassive continent-to-ocean lithosphere transitionRocksReading Chapter 3Pages 51-78Review questions:1, 2, 3, 4, 5, 17, 18Rock climbersEl CapitanYosemite mapRock types• Igneous rock• Sedimentary rock • Metamorphic rock• Melting—MagmaThe rock cycleRock cycle "shortcuts" or interruptions • Sedimentary rock melts • Igneous rock is metamorphosed • Sedimentary rock is weathered • Metamorphic rock weathersBasaltic lava splashbasaltRhyolite: Fine-grained igneous textureScoria: basaltCoarse-grained igneous texturePorphyritic igneous texturePorphyritic AndesitePorphyritic granite• http://www.soc.soton.ac.uk/soes/resources/collection/minerals/igne-1/pages/ig10.htmObsidian exhibits a glassy texturepumiceClassification of igneous rocksMagma types• Felsic—high silica• Mafic—only about half silica• Intermediate—by mixing of those two• Ultramafic—from mantle meltingMagma components• http://volcanoes.usgs.gov/Products/Pglossary/VolRocks.htmlGraniterhyoliteClassification of igneous rocksbasaltgabbroClassification of igneous rocksandesiteHornblende phenocrysts in andesite• http://www.pitt.edu/~cejones/GeoImages/2IgneousRocks/IgneousCompositions/5Andesite.htmlPorphyritic AndesitePorphyritic andesite• http://www.pitt.edu/~cejones/GeoImages/2IgneousRocks/IgneousCompositions/5Andesite.htmldioriteBowen’s Reaction SeriesSedimentary rock outcropsSediment depositionSedimentary rockSedimentary classificationsandstoneWhite cliffs of DoverfossilsDessication cracksRipple marksBefore deformationGranite and gneissSlateMarble• http://www.carrieresducharme.com/interest.htmFolded rockMetamorphic deformationFold in metamorphic rockConvergent plate boundary• http://my.execpc.com/~acmelasr/mountains/geogramsnf.htmlOceanic basin tectonics• http://my.execpc.com/~acmelasr/mountains/geogramsnf.htmlPassive continent-to-ocean lithosphere transition•
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