Geology mineral test study guide – Flashcards
Unlock all answers in this set
Unlock answersquestion
galena
answer
silvery gray cubic crystal, hardness of 2.5, dark gray streak color, metallic luster, 3 planes of perpendicular cleavage, mineral
question
halite
answer
perfect 3 direction cleavage, salty taste, almost any color, white streak color, hardness of 2.5, nonmetallic luster, mineral
question
quartz
answer
conchoidal fracture, almost any color, no cleavage, white streak color, hardness of 7, nonmetallic luster, mineral
question
Muscovite
answer
clearish green color, one perfect plane of cleavage, white streak color, hardness of 1, nonmetallic luster, mineral
question
biotite
answer
splits into sheets, greenish black color, one perfect direction of cleavage, gray to gray brown streak, hardness of one, nonmetallic luster, mineral
question
sulfur
answer
poor cleavage, has odor, bright yellow color, hollow, feels silky, pale streak color, hardness of 1.5, nonmetallic luster, mineral
question
granite
answer
felsic igneous rock, intrusive, contains feldspar, quartz, and biotite, phanertitic texture
question
andesite porphyry
answer
intermediate composition, extrusive igneous rock, porphyritic texture
question
obsidian
answer
glassy texture and look, extrusive igneous rock, dark color common, felsic, can have snowflakes
question
pumice
answer
felsic, extrusive igneous rock, vesicular texture, floats in water
question
tuff
answer
pyroclastic texture, felsic to mafic, extrusive igneous rock
question
coquina
answer
composed of cemented shell fragments. little or no matrix-/cement visible, reacts with HCL, contains calcite, bioclastic texture, biochemical sedimentary rock
question
conglomerate
answer
grains within rock are rounded, gravel sized particles, pebbles in rock, color and size varies, detrital sedimentary rock
question
breccias
answer
fragment grains within rock are angular and different sizes, gravel sized particles, detrital sedimentary rock
question
oolitic limestone
answer
reacts with HCL, gritty texture, commonly light colored, small layered spheres are characteristic, composed of calcite, chemical sedimentary rock
question
gneiss
answer
medium to coarse grained, light and dark banded layers, foliated metamorphic rock, parent rock granite, regional metamorphism
question
mica schist
answer
fine to medium grained, crystals visible, foliated metamorphic rock, sometimes has garnets, regional metamorphism
question
garnet mica schist
answer
contains crystals, dominated by mica, sparkly, parent rock shale?) foliated metamorphic rock, regional metamorphism
question
quartzite
answer
non-foliated metamorphic rock, almost any color, medium to coarse grained, usually light colored, parent rock quartz sandstone, one of the strongest metamorphic rocks
question
calcite
answer
almost any color, perfect 3 plane cleavage not at 90 degrees, effervesces with dilute HCL, hardness of 3, white streak color, non metallic luster,. mineral
question
marble
answer
medium to coarse grained, generally light colored, reacts with dilute HCL, parent rock, limestone or dolostone, non-foliated metamorphic rock, contact metamorphism
