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GLY 103
test 1
112
Geology
Undergraduate 2
02/13/2011

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Term
SCIENTIFIC METHOD
Definition
1. OBSERVATION
2. QUESTION
3. GATHER DATA
4. HYPOTHESES
5. THEORY
6. SCIENTIFIC LAW
Term
3 THEMES UNDERLYING THE STUDY OF GEOLOGY
Definition
1. THE EARTHS CRUST CONSIST OF A SERIES OF MOVING SECTIONS, OR PLATES, THAT MOVE IN RELATION TO ONE ANOTHER AS A RESULT OF PROCESSES ACTING DEEP WITHIN THE EARTH.
2. LIFE ON EARTH HAS EVOLVED THROUGH TIME.
3. EARTH PROCESSES HAVE BEEN ACTING IN SHAPING THE EARTH FOR IMMENSE PERIODS OF TIME.
Term
THE EARTH SYSTEM IN FOUR SPHERES
Definition
1. HYPROSPHERE - WATER
2. ATMOSPHERE - AIR GASES
3. BIOSPHERE - PLANT AND LIVING THINGS
4. GEOSPHERE - INTER EARTH
Term
SEDIMENTARY ROCK
Definition
THE HYDROLOGIC CYCLE WORKS IN CONJUNCTION WITH THE ROCK CYCLE IN THE WEATHERING TRANSPORTATION AND DEPOSITION OF SEDIMENTARY PARTICLES, AND IN THE COMPACTION AND CEMENTATION OF THOSE PARTICLES TO FORM SEDIMENTARY ROCK.
Term
PROPERTIES OF MINERALS
Definition
1. NATURALLY OCCURRING
2. INORGANIC
3. SOLID
4. CRYSTALLINE
Term
PROPERTIES FOR IDENTIFYING MINERALS
Definition
1. LUSTER - TEXTURE OF MINERAL
2. COLOR
3. ABILITY TO TRANSMIT LIGHT
4. STREAK
5. CRYSTAL SHAPE
6. HARDNESS
5. CLEVAGE
6. FRACTURE
7. DENSITY, SPECIFIC GRAVITY
Term
GRANITIC (FELSIC) IGNEOUS ROCKS
Definition
ARE COMPOSED MAINLY OF LIGHT COLORED SILICATE MINERALS, SUCH AS QUARTZ FELDSPAR MUSCOVITE MICA AND CLAY MINERALS.
Term
MAFIC IGENOUS ROCKS
Definition
COMPOSED MAINLY OF DARK COLORED SILICATE MINERALS, SUCH AS OLIVINE AMPHIBLES PYROZENES AND BIOTITE MICA
Term
3 TYPES OF ROCKS
Definition
IGNEOUS
METAMORPHIC
SEDIMENTARY
Term
MAGMA
Definition
SOLID (SILICATE MINERALS THAT HAVE CYSTALLIZED IN THE MELT)
LIQUID(THE MELT)
VOLATILES (MAINLY WATER)
Term
FORMATION OF MAGMA
Definition
INCREASE IN TEMPERATURE
DECREASE IN PRESSURE
ADDITION OF VOLATILES
Term
BASALITIC MAGMAS
Definition
1.FORM MAINLY IN THE EARTHS MANTLE.
2.TEND TO ERUPT IN OCEAN OR ISLANDS
3.CONATIN DARK SILICATES
4.LOW IN SILICA
5.LOW VISCOSITY
6.FOR HAWAIIAN TYPE VOLCANOES (NON EXPOLSIVE)
7.FORM THE ROCK BASALT IF REACHING THE SURFACE
8.FOR GABBRO BELOW SURFACE.
Term
GRANITIC MAGMAS
Definition
1. FORM AT SHALLOWER DEPTHS THAN BASALTIC
2. ERUPT IN CONTINENTAL ENVIRONMENTS
3. CONTAIN MAINLY LIGHT SILICATES
4. HIGH IN SILICA
5. HIGH VISCOSITY
6. FORM CINDER CONES (EXPLOSIVE)
7. FORM RHYOLITE AT SURFACE
8. FORM GRANITE BELOW SURFACE
Term
INTRUSIVE OR PLUTONIC
Definition
MAGMAS THAT SOLIDIFY BELOW THE EARTHS SURFACE
Term
EXTRUSIVE VOLCANIC
Definition
MAGMA THAT SOLIDIFY ON THE EARTHS SURFACE
Term
APHANITIC TEXTURE
Definition
FINE GRAINED IGNEOUS ROCKS TYPICALLY FORM AT THE EARTHS SURFACE AND RESULT FROM RAPID COOLING
Term
PHANERITIC TEXTURE
Definition
COARSE GRAINED IGNEOUS ROCKS FORMED BELOW THE EARTHS SURFACE RESULT FROM SLOWER COOLING
Term
PORPHYRITIC
Definition
IGNEOUS TEXTURES RESULT FROM MATERIAL EJECTED FROM EXPLOSIVE VOLCANOES
Term
PEGMATITIC
Definition
IGNEOUS TEXTURES CONTAIN LARGE CRYSTALS IN A FINER-GRAINED MATRIX AND RESULT FROM ION RICH FLUIDS CIRCULATING AT A LATE STAGE IN THE SOLIDIFICATION OF MAGMA
Term
SHIELD VOLCANOES
Definition
FORM BROAD, GENTLY-SLOPING DOMES AND CONSIST MAINLY OF BASALTIC TYPE MAGMAS
Term
CINDER CONES
Definition
ARE STEEPLY SIDED VOLCANOES CONSISTING DOMINANTLY OF PYROCLASTIC MATERIAL
Term
COMPOSITE VOLCANOES (STRATOVOLCANOES)
Definition
CONSIST OF ALTERNATING DEPOSITS OF LAVA AND PYROCLASTIC MATERIAL
Term
LAHAR
Definition
VOLCANIC MUDFLOW
Term
CALDERA
Definition
LARGE, FAULT BOUNDED VOLCANIC CRATER FORMED BY THE COLLAPSE OF A VOLCANIC VENT INTO A PARTIALLY EVACUATED MAGMA CHAMBER
Term
FISSURE ERUPTIONS
Definition
THE GREATEST VOLUME OF LAVA EXTRUDING ONTO THE EARTH SURFACE IS THROUGH FISSURE ERUPTIONS, FORMING EXTENSIVE FLOWS OF MAGMA THAT SOLIDIFY TO FORM FLOOD BASALTS.
Term
LAVA DOMES
Definition
FELSIC (GRANITIC) MAGMAS BECAUSE OF THEIR HIGH VISCOSITY OFTEN EXUDE ONLY A SHORT DISTANCE OUT OF THE VOLCANIC VENT BEFORE THEY SOLIDIFY WITHIN THE CRATER FORMING LAVA DOMES
Term
COLUMNAR JOINTING
Definition
COLLING MAGMAS OFTEN CONTRACT TO FORM POLYGONAL JOINTING PATTERN CALLED COLUMNAR JOINTING
Term
PARENT ROCK
Definition
METAMORPHIC ROCKS FORM FROM AN ORIGINAL IGNEOUS, SEDIMENTARY, OR OTHER METAMORPHIC ROCK CALLED PARENT ROCK
Term
METAMORPHIC FACTORS
Definition
HEAT, PRESSURE, CIRCULATING FLUIDS
Term
GEOTHERMAL GRADIENT
Definition
THE RATE AT WHICH TEMPERATURES INCREASE WITH DEPTH IN THE EARTH IS CALLED GEOTHERMAL GRADIENT.
Term
CONFINING PRESSURE
Definition
PRESSURE CAN BE APPLIED EQUALLY FROM ALL DIRECTIONS
Term
DIFFERENTIAL PRESSURE
Definition
PRESSURE APPLIED PREFERENTIALLY APPLIED FROM CERTAIN DIRECTIONS.
Term
METAMORPHIC TEXTURES
Definition
1. FOLIATED - DEFORMED DUE TO PRESSURE CAUSING INDIVIDUAL GRAINS TO DEVELOP A PREFERRED ORIENTATION.
2. NON-FOLIATED - MARBLE - METAMORPHOSED LIMESTONE - QUARTZITE - METAMORPHOSED SANDSTONE.
3. PORPHYROBLASTIC - ANALOGOUS OR PORHYRITIC TEXTURE IN IGNEOUS ROCKS LARGE CRYSTALS IN A MATRIX OF FINER MATERIAL
Term
CONTACT (THERMAL) METAMORPHISM
Definition
METAMORPHISM RESULTING FROM BAKING OF PARENT ROCK IN CLOSE PROXIMITY TO IGNEOUS MAGMA
Term
HYDROTHERMAL METAMORPHISM
Definition
RESULTS FROM CIRCULATION OF ION-RICH FLUIDS AFTER MAGMA COOLS
Term
REGIONAL METAMORPHISM
Definition
THE MOST EXTENSIVE FORM OF MERAMORPHISM OCCURS DURING MOUNTAIN BUILDING ALONG BOUNDARIES OF COLLIDING CONTINENTAL PLATES.
Term
FAULT-ZONE METAMORPHISM
Definition
RESULTS FROM FRICTION ALONG FAULT PLANES AT CONSIDERABLE DEPTH IN THE EARTH
Term
IMPACT METAMORPHISM
Definition
RESULTS FROM EXTREME HEAT AND PRESSURE AT POINT OF METEORITE IMPACT
Term
MECHANICAL WEATHERING
Definition
1. FROST WEDGING - RESULTS FROM ALTERNATING EXPANSION AND CONTRACTION CAUSE BY FREEZING AND THAWING OF ICE.
2. SALT-CRYSTAL GROWTH - RESULTS FROM EVAPORATION OF SEAWATER IN COASTAL REGIONS, ALSO OCCURS IN ARID REGIONS WHERE EVAPORATION RATES ARE HIGH
3. SHEETING - OCCURS IN LARGE BODIES OF IGNEOUS ROCKS DUE TO EROSIONAL UNLOADING.
4. BIOLOGICAL ACTIVITY - PLANTS GROW INTO FRACTURES AND EXPAND THEM, ANIMALS BURROWING, ETC
Term
CHEMICAL WEATHERING
Definition
1. DISSOLUTION - USUALLY CAUSED BY WEAK ACIDS RESULTING FROM MIXTURE OF WATER WITH DISSOLVED GASES.
2. OXIDATION - ADDITION OF OXYGEN TO SOMETHING EX IRON FORMING RUST
3. HYDROLYSIS - REACTION WITH WATER - MAIN PROCESS BY WHICH SILICATES WEATHER
Term
RATES OF WEATHERING
Definition
IS A FUNCTION OF CLIMATE AND ROCK CHARACTERISTICS.
Term
SOIL FORMATION FACTORS
Definition
1. PARENT MATERIAL
2. CLIMATE
3. PLANTS AND ANIMALS
4. TOPOGRAPHY
5. TIME
Term
SOIL PROFILE
Definition
CONSIST OF DISTINCT LAYERS CALLED HORIZONS
1. SOLUM (TRUE SOIL)(O-B)
TOP SOIL (O-A)
O - MAINLY ORGANIC MATTER
A - MAINLY MINERAL MATTER, SOME BIO
E- LIGHT COLORED VERY LITTLE ORGANIC, MINERALS BLEACHED OUT
B- SUBSOIL (ZONE OF ACCUMULATION)- CONTAINS A LOT OF MINERAL MATTER WEATHERED OUT OF E LAYER
C- MAINLY PARTLY ALTERNATED PARENT- ROCK REGOLITH
Term
MASS WASTING PROCESSES
Definition
EROSION DUE TO GRAVITY
1. FALL
2. SLIDE
3. FLOW
Term
MASS WASTING RATES
Definition
1. FAST - SLUMP, ROCK SLIDED, DEBRIS FLOW, EARTHFLOWS.
2. SLOW - CREEP, SOLIFLUCTION (WATER MAKING MATTER UNSTABLE)
Term
MASS WASTING RATES
Definition
1. FAST - SLUMP, ROCK SLIDED, DEBRIS FLOW, EARTHFLOWS.
2. SLOW - CREEP, SOLIFLUCTION (WATER MAKING MATTER UNSTABLE)
Term
GROUND WATER
Definition
UNSATURATED ZONE (VADOSE ZONE)
- ZONE OF SOIL MOSTURE - NEAR SURFACE - PLANT ROOTS
- CAPILLARY FRINGE
- - BOUNDARY, WATER TABLE
ZONE OF SATURATION (PHREATIC ZONE) ALL PORES FILLED WITH WATER
- WATER IN THIS ZONE GROUND WATER.
Term
GAINING STREAM
Definition
A STREAM THAT IS COLLECTING MORE WATER FROM GROUNDWATER THAN IT IS LOSING
Term
LOSING STREAM
Definition
A STREAM THAT IS LOSING MORE WATER TO GROUNDWATER THAN GAINING
Term
POROSITY
Definition
AMOUNT OF OPEN PORE SPACE IN ROCK OR SOIL
Term
POROSITY
Definition
AMOUNT OF OPEN PORE SPACE IN ROCK OR SOIL
Term
PERMEABILITY
Definition
THE ABILITY OF FLUIDS TO CIRCULATE THROUGH A ROCK OR SOIL
Term
AQUATARD
Definition
LAYER OF ROCK OR SOUL THAT INHIBITS THE MOVEMENT OF WATER
Term
AQUIFER
Definition
LAYER OF ROCK OR SOUL THAT TRANSMITS WATER EASILY
Term
DRAINAGE BASIN
Definition
THE TOTAL GEOGRAPHIC AREA THAT CONTRIBUTES WATER TO A STREAM OR RIVER
Term
DRAINAGE DIVIDE
Definition
AN IMAGINARY LINE THAT SEPARATES THE AREAS DRAINED BY TWO STREAMS
Term
BEDROCK CHANNELS
Definition
STREAM CUTTING INTO SOLID BEDROCK
Term
ALLUVIAL CHANNELS
Definition
CUT INTO SEDIMENT PREVIOUSLY DEPOSITED
Term
TYPES OF GLACIERS
Definition
ALPINE (VALLEY, MOUNTAIN) - FLOW DOWN MOUNTAIN
CONTINENTAL (ICE SHEETS)- FLOW OUTWARD FROM TOP
Term
FORMATION OF GLACIERS
Definition
Term
TILL
Definition
UNSORTED MASS OF MATERIAL LEFT WHEN GLACIERS MELT
Term
ERRATICS
Definition
LARGE BOULDERS LEFT FROM GLACIERS MELTING
Term
MORRANIES
Definition
LATERAL- LEFT FROM GLACIER PATH
MEDIAL- GLACIERS JOIN TOGETHER A FLOW
END- ROUND AREA COVERED BY GLACIER DEBRI
GROUND- LAYER OF UNSORTED GLACIAL SEDIMENT DEPOSITED AS GLACIER RETREATS.
Term
GLACIAL EFFECTS
Definition
CRUSTAL SUBSIDENCE AND REBOUND
SEA-LEVEL CHANGES
CHANGES TO RIVERS AND VALLEYS
ICE DAMS
Term
PLAYA/PLAYA LAKE
Definition
FLAT CENTRAL AREA OF UNDRAINED DESERT BASIN
TEMPORARY LAKE IN PLAYA
Term
INTERIOR DRAINAGE
Definition
A DISCONTINUOUS PATTERN OF INTERMITTEN STREAMS THAT DO NOT FLOW TO THE OCEAN
Term
SEDIMENT
Definition
PARTICLES CREATED BY WEATHERING AND EROSION OF ROCK, BY CHEMICAL PRECIPITATION FROM SOLUTION IN WATER OR FROM THE SECRETIONS OF ORGANISIMS AND TRRANSPORTED BY WATER WIND OR GLACIERS.
Term
BEDLOAD
Definition
SEDIMENT MOVED ALONG THE BOTTOM OF A STREAM BY MOVING WATER OR PARTICLES MOVED ALONG THE GROUND BY WIND.
Term
SALTATION
Definition
TRANSPORTATION OF SEDIMENT THROUGH A SERIES OF LEAPS OR BOUNCES
Term
SUSPENDED LOAD
Definition
THE FINE SEDIMENT CARRIED WITHIN THE ODY OF FLOWING WATER OR AIR
Term
WIND EROSION
Definition
1. DEFLATION- THE LIFTING OR REMOVING OF LOOSE MATERIAL BY WIND
2. BLOWOUTS- A DEPRESSION EXCAVATED BY WIND EASILY ERODED MATERIALS.
3. DESERT PAVEMENT- A LAYER OF COARSE PEBBLES AND GRAVEL CREATED WHEN WIND REMOVED THE FINER MATERIAL.
4. VENIFACTS - A COBBLE OR PEBLE POLSIHED AND SHAPED BY SANDBLASTING OF WIND.
Term
WIND DEPOSITS
Definition
1. SAND DUNES - A HILL OR RIDGE OF WIND DEPOSITED SAND.
2. CROSS BEDS- LAYERS INCLINED AT AN ANGLE FORMED BY WIND CURRENTS
2. SILT LOESS- DEPOSITS OF WINDBLOWN SILT, NO LAYERS, BUFF COLORED, VERTICAL CLIFF.
Term
FORMATION OF SEDIMENTARY ROCK
Definition
1. WEATHERING -
2. TRANSPORT
3. DEPOSITION
Term
DIAGENESIS
Definition
A COLLECTIVE TERM FOR ALL THE CHEMICAL, PHYSICAL, AND BIOLOGICAL CHANGES THAT TAKE PLACE AFTER SEDIMENTS ARE DEPOSITED AND DURING AND AFTER LITHIFICATION
Term
LITHIFICATION
Definition
THE PROCESS GENERALLY CEMENTATION AND OR COMPACTION OF CONVERT IN SEDIMENTS TO SOLID ROCK
Term
COMPACTION
Definition
A TYPE OF LITHIFICAITON IN WHICH THE WEIGHT OF OVERLYING MATERIAL COMPRESSES MORE DEEPLY BURIED SEDIMENT, SHALE.
Term
CEMENTATION
Definition
WAY SEDIMENTS ARE LITHIFIED MATERIAL FROM WATER FILLS SPACES WITH WATER AND ARE HARDENDED INTO A SOLID.
Term
DETRIAL SEDIMENTARY ROCKS
Definition
ROCKS THAT FORM FROM THE ACCUMULATION OF MATERIALS THAT ORIGINATED AND ARE TRANSPORTED AS SOLID PARTICLES DERIVED FROM BOTH MECHANICAL AND CHEMICAL WEATHERING. SHALE SANDSTONE CONGLOMERATE/BRECCIA.
Term
CHEMICAL SEDIMENTARY ROCKS
Definition
SEDIMENTARY ROCK CONSISTING OF MATERIAL THAT WAS PRECIPITATED FROM WATER. LIMESTONE, CHERT, EVAPORITES, HALITE GYPSUM
Term
CONGLOMERATE
Definition
SEDIMENTARY ROCK COMPOSED OF ROUNDED GRAVEL SIZED PARTICLES.
Term
EVAPORITES
Definition
SEDIMENTARY ROCK FORMED OF MATERIAL DEPOSITED FROM SOLUTION BY EVAPORATION OF THE WATER. HALITE, GYPSUM.
Term
BRECCIA
Definition
SEDIMENTARY ROCK COMPOSED OF ANGULAR FRAGMENTS THAT WERE LITHIFIED.
Term
CLASSIFICATION OF SEDIMENTARY ROCKS
Definition
CLASTIC- GRAIN SIZE
CHMICAL- MINERAL COMPOSTION
Term
SEDIMENTARY ENVIRONMENTS
Definition
CONTINENTAL
MARINE
TRANSITIONAL
Term

SEDIMENTARY STRUCTURES

Definition

1. STRATA- PARALLEL LAYERS OF SEDIMENTARY ROCK

2. CROSS BEDDING- THIN LAYERS INCLINED AR AN ANGLE TO THE MAIN BEDDING

3. RIPPLE MARKS - CURRENT (GO IN DIRECTION OF CURRENT)-OSCILLATION  (BACK AND FORTH FROM SURFACE WAVES)

4. RAINDROP IMPRINTS - 

5. FOSSILS

Term
ROCK DEFORMATION STRESS
Definition
CONFINING PRESSURE- EQUAL
DIFFERENTIAL - UNEQUAL & DIFFERENT DIRECTION
Term
COMPRESSIONAL STRESS
Definition
DIFFERENTIAL STRESS THAT SHORTENS ROCK BODY
Term
TENSIONAL STRESS
Definition
PULLS ROCK BODY APART
Term
SHEAR STRESS
Definition
STRESS THAT CAUSES TWO ADJACENT PARTS OF A BODY TO SLIDE PAST EACH OTHER.
Term
ELASTIC DEFORMATION
Definition
SUDDEN RELEASE OF STORED STRAIN IN ROCKS THAT RESULTS IN MOVEMENT ALONG A FAULT.
Term
BRITTLE DEFORMATION
Definition
LOSS OF STRENGTH BY A MATERIAL IN SUDDEN FRACTURING
Term
DUCTILE DEFORMATION
Definition
SOLID STATE FLOW THAT PRODUCES A CHANGE IN THE SIZE AND SHAPE OF ROCK WITHOUT FRACTURING. DEEP WITH HIGH PRESSURE AND TEMPERATURE.
Term
FACTORS THAT AFFECT DEFORMATION
Definition
ROCK TYPE
TEMPERATURE
CONFINING PRESSURE
TIME
Term
BOWENS REACTION SERIES
Definition
CONCEPTS THAT ILLUSTRATES THE RELATIONSHIP BETWEEN MAGMA AND THE MINERALS CRYSTALLIZING FROM IT DURING THE FORMATION OF IGNEOUS ROCKS.
Term
EPICENTER
Definition
THE LOCATION ON THE EARTHS SURFACE THAT LIES DIRECTLY ABOVE THE FOCUS OF AN EARTHQUAKE
Term
HYPOCENTER
Definition
THE ZONE WITHIN EARTH WHERE ROCK DISPLACEMENT PRODUCES AN EARTHQUAKE
Term
SEISMIC WAVE
Definition
A RAPIDLY MOVING WAVE GENERATED BY EARTHQUAKE ACTIVITY CAPABLE OF INFLICTING HEAVY DAMAGE ON COASTAL REGIONS.
Term
MODIFIED MECALLI INTENSITY SCALE
Definition
A 12 POINT SCALE DEVELOPED TO EVALUATE EARTHQUAKE INTENSITY BASED ON THE AMOUNT OF DAMAGE TO VARIOUS STRUCTURES.
Term
RICHTER SCALE
Definition
A SCALE OF EARTHQUAKE MAGNITUDE BASED ON THE AMPLITUDE OF THE LARGEST SEISMIC WAVE.
Term
PALEOCLIMATOLOGY
Definition
STUDY OF ANCIENT CLIMATES, BEFORE PERIOD OF INSTRUMENTAL RECORDS USING PROXY DATA
Term
PROXYS OF PALEOCLIMATOLOGY
Definition
SEAFLOOR SEDIMENTS
OXYGEN ISOTOPES
TREE RINGS
FOSSIL POLEN
CORALS
HISTORICAL RECORDS.
Term
ATMOSPHERE
Definition
GASESOUS PORTION OF THE PLANET. OXYGEN, NITROGEN, WATER VAPOR, OZONE, AEROSOLS.
Term
ATOMOSPHERE STRUCTURE
Definition
PRESSURE & TEMPERATURE CHANGES WITH ALTITUDE
1.TROPOSHERE - TROPOPAUSE(BOTTOM)
2. STRATOSPHER - STRATOSPAUSE
3. MESOPHERE- MESOPAUSE
4. THERMOSPHERE- (TOP)
Term
GREENHOUSE EFFECT
Definition
THE TRANSMISSION OF SHORTWAVE SOLAR RADIATION BY THE ATMOSPHERE COUPLED WITH THE SELECTIVE ABSOPTION OF LONGER WAVE LENGTH TERRESTRIAL RADIATION ESPECIALLY BY WATER VAPOR AND CARBON DIOXIDE RESULTING IN WARMING OF THE ATMOSPHERE.
Term
Shale
Definition
unmetapmorphosed parent rock spits along bedding planes. foliated
Term
slate
Definition
foliated, mica is recrystallized into orientated zones along which the rock splits called clevage.
Term
PHYLLITE
Definition
FOLIATED- CRYSTALS LARGER THAN SLATE- GLOSSY APPERANCE - GOOD CLEAVE ZONES
Term
SCHIST
Definition
FOLIATED- CRYSTALS VISIBLE TO NAKED EYE- ROCK STILL SPLITS BUT NOT AS EASY, WAVY SURFACE
Term
GNEISS
Definition
FOLIATED- LIGHT AND DARK MINERALS ALTERNATING IN BANDS- DOES NOT SPLIT EASY
Term
MARBLE
Definition
NON FOLIATED- METAMORPHOSED LIMESTONE
Term
QUARTZITE
Definition
NON FOLIATED- METAMORPHOSED SANDSTONE.
Term
PORPHYROBLASTIC
Definition
ANALOHOUS TO PORHYRITIC TEXTURE IN IGNEOUS ROCKS, LARGE CRYSTALS WITH MATRIX OR FINER MINERAL
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