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Published byJanet Biglow Modified over 9 years ago
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ROCKS AND MINERALS Chapters 2 & 3 Test 2 material Begin
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Grand Canyon
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RELATIVE TIME TIME IN RELATIONSHIP WHILE COMPARING ONE ROCK LAYER WITH ANOTHER
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GEOLOGIC LAWS - SUPERPOSITION EACH LAYER OF ROCK IS OLDER THAN THE LAYER ABOVE IT AND YOUNGER THAN THE LAYER BELOW IT
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GEOLOGIC LAWS - CROSS CUTTING WHEN ROCKS CUT THROUGH OTHER ROCKS, THEY ARE ASSUMED TO BE YOUNGER THAN THE ROCKS THEY CUT THROUGH
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GEOLOGIC LAW - INCLUSIONS PIECES OF OLDER ROCK CONTAINED WITHIN A YOUNGER ROCK
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TYPES OF FOSSILS PETRIFICATION - TURNED TO STONE INDIRECT EVIDENCE - TRACE OF ITS EXISTENCE (COPROLITE) ACTUAL REMAINS - SHELL IMPRINT - BIRD TRACKS OR WORM BURROWS ONLY FOUND IN SEDIMENTARY ROCK
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PETRIFICATION
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COPROLITE - INDIRECT
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SHARK TOOTH – ACTUAL
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IMPRINT
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OPPOSING THOUGHT - UNIFORMITARIANISM SAME PHYSICAL PROCESSES ACTIVE TODAY HAVE BEEN OPERATING THROUGHOUT GEOLOGIC TIME PRESENT HOLDS KEY TO PAST JAMES HUTTON - FATHER OF MODERN GEOLOGY
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OPPOSING THOUGHT - CATASTROPHISM CATASTROPHIC OR CATACLYSMIC EVENTS HAVE ALTERED DEPOSITION AND EROSION THROUGHOUT TIME SCABLANDS OF IDAHO - 100,000 YEARS OF EROSION TOOK PLACE IN A 30 DAY PERIOD
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HOW ROCK DIFFERS ACROSS THE EARTH’S CRUST CONTINENTAL ROCK - GRANITE - SIAL WHICH IS COMPOSED OF SILICA AND ALUMINUM AND LIGHTER THAN OCEAN ROCK OCEAN ROCK - BASALT - SIMA WHICH IS HEAVIER AND COMPOSED OF SILICA AND MAGNESIUM
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GEOLOGIC CONCEPT - ISOSTACY EQUILIBRIUM STATE IN EARTH’S CRUST FORMED BY THE RELATIONSHIP OF PORTIONS OF THE LITHOSPHERE & ASTHENOSPHERE LOG FLOATING IN RIVER
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GEOLOGIC CYCLES HYDROLOGIC CYCLE ROCK CYCLE TECTONIC CYCLE
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MINERAL INORGANIC SOLID NATURAL COMPOUND HAVING A SPECIFIC CHEMICAL FORMULA AND POSSESSING A CRYSTALLINE STRUCTURE THAT IS FIXED OR VARIES WITHIN A DEFINITE RANGE
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EXAMPLES OF MINERALS TALC GYPSUM CALCITE QUARTZ SULFUR HALITE GRAPHITE
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GALENA FLUORITE APATITE MAGNETITE DIAMOND
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PHYSICAL PROPERTIES LUSTER - APPEARANCE OF LIGHT REFLECTED FROM A MINERAL - METALLIC OR NONMETALLIC COLOR - INHERENT OR EXOTIC STREAK - AFTER RUBBING MINERAL ACROSS A PORCELAIN PLATE THE LEFTOVER POWDER RESIDUE
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STREAK PLATE
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SPECIFIC GRAVITY - WEIGHT OF MINERAL TO EQUAL VOLUME OF WATER CLEAVAGE - ABILITY TO BREAK OR CLEAVE IN CERTAIN DIRECTIONS MORE READILY THAN OTHERS FRACTURE - DOES NOT BREAK IN CERTAIN DIRECTIONS
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CLEAVAGE
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FRACTURE
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MAGNETISM - CAN PICK UP WITH MAGNET TASTE - HALITE FEEL - TALC (SOAPY) GRAPHITE (OILY OR GREASY) ACID TEST - WILL FIZZ OR BUBBLE HARDNESS - SCRATCHING RESISTANT
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MOH’S SCALE OF HARDNESS 1 = TALC 2 = GYPSUM 2.5 = HUMAN FINGERNAIL 3 = CALCITE 4 = FLUORITE 5 = APATITE 5.5 = GLASS
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7 = QUARTZ 10 = DIAMOND IF YOU SCRATCH IT WITH YOUR FINGER NAIL = LESS THAN 2.5 CAN’T SCRATCH IT AND IT WON’T SCRATCH GLASS = 2.5-5.5 SCRATCHES GLASS = GREATER 5.5
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MINERAL GROUPS SILICATES OXYGEN & SILICON ATOMS SILICON-OXYGEN TETRAHEDRON [4 OXYGEN ATOMS SURROUNDING A MUCH SMALLER SILICON ATOM] FELDSPARS, QUARTZ, MICAS, HORNBLENDE, OLIVINE, AUGITE
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SILICON-OXYGEN TETRAHEDRON
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NON-SILICATE MINERALS CARBONATES - CALCITE & DOLOMITE HALIDES - HALITE & FLUORITE NATIVE ELEMENTS - GOLD, COPPER, DIAMOND, GRAPHITE, SILVER SULFATES - GYPSUM SULFIDES - GALENA & PYRITE OXIDES - MAGNETITE & HEMATITE
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USES OF NON-METALLIC MINERALS APATITE - FERTILIZERS ASBESTOS - FIBERS CALCITE - CHEMICALS, CEMENT CLAY [KAOLINITE] CHINA, KAOPECTATE FLUORITE - GLASS, CHEMICALS GRAPHITE - PENCIL LEAD
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GYPSUM - PLASTER OF PARIS HALITE - TABLE SALT MUSCOVITE - ELECTRICAL INSULATOR SULFUR - CHEMICALS TALC - BABY POWDER, PAINTS
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GEMSTONES PRECIOUS DIAMOND EMERALD [BERYL] OPAL RUBY [CORUNDUM] SAPPHIRE [CORUNDUM]
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DIAMONDS
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EMERALDS
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GEMSTONES SEMIPRECIOUS AMETHYST - QUARTZ CAT’S EYE - QUARTZ GARNET JADE - JADEITE MOONSTONE - FELDSPAR TOPAZ TURQUOISE ZIRCON
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AMETHYST
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METALLIC MINERAL RESOURCES ALUMINUM, CHROMIUM, COPPER, GOLD, IRON, LEAD, MAGNESIUM, MERCURY, NICKEL, PLATINUM, SILVER, TIN, TITANIUM, TUNGSTEN, URANIUM, ZINC
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ROCK TYPES IGNEOUS SEDIMENTARY METAMORPHIC ROCK CYCLE
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IGNEOUS ROCKS FORM WHEN MAGMA OR LAVA COOLS AND CRYSTALLIZES COOLS RAPIDLY HAVE SMALL CRYSTALS - EXTRUSIVE COOLS SLOWLY HAVE LARGE CRYSTALS - INTRUSIVE
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INTRUSIVE IGNEOUS ROCKS COOL SLOWLY IN THE CRUST (MAGMA) EXTRUSIVE IGNEOUS ROCKS COOL RAPIDLY AT THE SURFACE (LAVA) WHICH WILL HAVE THE LARGE CRYSTAL SIZE?
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CLASSIFYING IGNEOUS ROCKS MINERAL COMPOSITION TEXTURE - OVERALL APPEARANCE OF ROCK BASED ON SIZE & ARRANGEMENT OF CRYSTALS FINE-GRAINED COARSE-GRAINED PORPHYRITIC GLASSY
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FINE-GRAINED
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COARSE-GRAINED
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PORPHYRITIC
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IGNEOUS ROCKS GRANITE BASALT PUMICE OBSIDIAN RHYOLITE
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SEDIMENTARY ROCKS BITS AND PIECES OF EXISTING ROCK ARE TRANSPORTED THEN LITHIFIED BY COMPRESSION, COMPACTION, AND CEMENTATION LAID DOWN IN HORIZONTALLY LAYERED BEDS ONLY ROCK TYPE TO CONTAIN FOSSILS
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CLASSIFYING SEDIMENTARY ROCKS DETRITAL SEDIMENTARY ROCKS - ORIGINATE AS SOLID PARTICLES FROM WEATHERED ROCKS CHEMICAL SEDIMENTARY ROCKS - SOLUBLE MATERIAL PRODUCED BY CHEMICAL WEATHERING
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CLASSIFICATION BY PARTICLE SIZE - DETRITAL BOULDER, COBBLE, PEBBLE = GRAVEL = CONGLOMERATE OR BRECCIA SAND = SAND = SANDSTONE SILT = MUD = SILTSTONE CLAY = MUD = SHALE
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GRAVEL-SIZED
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SAND-SIZED
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SILT-SIZED
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CLAY-SIZED
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SEDIMENTARY ROCKS CONGLOMERATE SANDSTONE SILTSTONE SHALE LIMESTONE PEAT MOSS & LIGNITE COAL BITUMINOUS COAL
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METAMORPHIC ROCKS TRANSFORMED FROM PRE-EXISTING ROCKS BY EITHER HEAT, PRESSURE, OR CHEMICAL ACTION FOLIATED (BANDS OR LAYERS) AND NON-FOLIATED
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FOLIATED METAMORPHIC ROCKS SLATE SCHISTS GNEISS
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FOLIATED ROCK
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NON-FOLIATED METAMORPHIC ROCKS MARBLE QUARTZITE
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NON-FOLIATED ROCK
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OLD ROCK TO METAMORPHIC EQUIVALENT GRANITE BECOMES GNEISS MICA BECOMES SCHIST SHALE BECOMES SLATE LIMESTONE BECOMES MARBLE SANDSTONE BECOMES QUARTZITE BITUMINOUS COAL BECOMES ANTHRACITE COAL
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Yosemite Valley
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