Types of Rocks. 3 Major (Geologic) Rock Groups Igneous Rock Sedimentary Rock Metamorphic Rock.
metamorphic rock cheat
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Slate Foliated Crystalline mica Low, dull sheen Low grade shale Calcitic marble Nonfoliated Calcite Sugary sparkle Low grade limestone Anthracit coal Nonfoliated Carbon rich no minerals Very shiny brittle Low to intermediate Bituminous coal Gnesis Foliated Quatz,feldspar,hornb lende Dark and light High grade Schist Garnet-mica schist Weakly foliated Mica,garnet prophyroblasts Perfect small crystals of garnet Intermediate 2high grade Hornfels Nonfoliated Dark ferromagnesian Dull granular Low grade Possibly basalt Quartzite Nonfoliated Quartz h=7,dense, pure quartz Variable sandstone Granite gnesiss Foliated Quartz,orthoclase,mica Color banded dark & light High grade Granite Phyllite Foliated Mica,microcrystalline Velvety sheen,wrinkeled clev. Intermediate grade Slate Mica schist Foliated Mica Dark color, dull sheen, good clev Intermediate to high grade phyllite Metaconglomerate Nonfoliated Quartz, chert Stretched pebbles Low to intermediate grade conglomerate Talc schist soapstone Foliated Talc Soapy feel Low grade greenstone
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Transcript of metamorphic rock cheat
Slate
FoliatedCrystalline micaLow, dull sheenLow grade
shale
Calcitic marble
NonfoliatedCalciteSugary sparkleLow grade
limestone
Anthracit coal
NonfoliatedCarbon rich no minerals
Very shiny brittle
Low to intermediate
Bituminous coal
Gnesis
FoliatedQuatz,feldspar,hornblende
Dark and lightHigh grade
Schist
Garnet-mica schist
Weakly foliatedMica,garnet prophyroblastsPerfect small crystals of garnetIntermediate 2high grade
phyllite
Hornfels
NonfoliatedDark ferromagnesianDull granularLow grade
Possibly basalt
Quartzite
NonfoliatedQuartzh=7,dense, pure quartz
Variable
sandstone
Granite gnesiss
Foliated
Quartz,orthoclase,micaColor banded dark & light
High grade
Granite
Phyllite
FoliatedMica,microcrystallineVelvety sheen,wrinkeled clev.Intermediate grade
Slate
Mica schist
FoliatedMicaDark color, dull sheen, good clev
Intermediate to high grade
phyllite
Metaconglomerate
NonfoliatedQuartz, chert
Stretched pebblesLow to intermediate grade
conglomerate
Talc schist soapstone
FoliatedTalc
Soapy feelLow grade
greenstone
Quartzite
NonfoliatedQuartz
H=7, dense, pure quartzIntermediate, variable
sandstone
Amphibolite hornblende schist
Weakly foliatedHornblende
Hornblende crystals alignedIntermediate to high grade
Andesite, or basalt
Slate
FoliatedMicro-crystalline mica
Low, dull sheenLow grade
shale
Gneiss
FoliatedQuartz, feldspar, micaDark & lightHigh grade
Schist or granite
Gneiss greenstone
Foliated
Chlorite
Soft, shiny flakesHigh or low grade
basalt
Dolomitic schist
Non or foliatedMica, weathered garnet dolomitic
CrystallineIntermediate?
dolostone
Chlorite schist
FoliatedChlorite
High sheen, wrinkeled clev.Low grade
basalt
Graphite schist
FoliatedGraphite
Very dark, soft, shinyHigh grade
Anthracite coal
Serpentinite
Weakly, or nonfoliatedSerpentine, some quartz
Dark green, dull Low grade, variable
periodotite
Slate
FoliatedMicro-crystalline mica
Dull sheenLow grade
shale
