GEO 111 Rocks and Mineral Flashcards

Terms Definitions
Porphoritic rhyolite
type:igneous
texture:porphoritic
color index:felsic
major minerals:potassium feldspar, quartz, biotite,
intursive or extrusive: extrusive
plutonic or volcanic: volcanic
marble
type:metamorphic
foliation?:nonfolitated
major minerals:calcite
parent rock:limestone
meta-environment: heat & contact
gneiss
type:metamorphic
foliation?:foliated
major minerals: quartz, mica, feldspars
parent rock: granite, slate, philite, shist
meta-environment: high regional
metaconglomerate (tillite)
foliation: nonfoliated
major minerals: various pebbles
parent rock: conglomerate
meta-environment: heat- contact
andesite
type- igneous
texture- porphyritic
color index- intermediate
major minerals- plag. feldspar, amphibole, biotite
intrusive or extrusive- extrusive
plutonic or volcanic- volcanic
granite
type- igneous
texture- phanitic
color index- felsic
major minerals- quartz, orthoclase, biotite, plagioclase
intrusive or extrusive- intrusive
plutonic or volcanic- plutonic
granite pegmitite
type- igneous
texture- pegmatitic
color index- felsic
major minerals- quartz, orthoclase, biotite, plagioclase
intrusive or extrusive- intrusive
plutonic or volcanic- plutonic
ryolite (tuff)
type- igneous
texture- aphanitic
color index- felsic
major minerals- glass
intrusive or extrusive- extrusive
plutonic or volcanic- volcanic
basalt
type- igneous
texture aphanitic
color index- mafic
major minerals- olivine, pyroxene, plagioclase, glass
intrusive or ex- extrusive
plutonic or volcanic- volcanic
diorite
type-igneous
texture- phaneritic
color index- intermediate
major minerals- orthoclase, quartz, plagioclase, biotite, amphibole
intrusive or ex- intrusive
plutonic or volcanic- volcanic
gabbro
type- igneous
texture- phaneritic
color index- mafic
major minerals- plagioclase, pyroxene, olivine
intrusive or ex- intrusive
plutonic or volcanic- plutonic
scoria
type- igneous
texture- vesicular
major minerals- glass
in or extrusive- ex
plutonic or volcanic- volcanic
pumice
type-igneous
texture- vesicular
major minerals- glass
intrusive or ex- ex
plutonic or volcanic- volcanic
obsidian
type- igneous
texture- felsic
color index- n/a since glass
major minerals- glass
in or ex- extrusive
plutonic or volcanic- volcanic
mica shist
type- metamorphic
foliaiton- foliated
major minerals- mica
parent rock- shale/ slate
meta- environment
amphibole shist
type- metamorphic
foliation- foliated
major minerals- amphibole, mica, quartz
parent rock- phylite, slate
meta-environment- intermediate regional
quartzite
type- metamorphic
folation- non
major minerals- quartz
parent rock- quartz sandstone
meta environment
slate
type- metamorphic
floation- foliated
major minerals- mica, clay minerals
parent rock- shale
meta-environment- low regional metamorphism
breccia
type- sedimentary
class- clastic
texture- angular pebbles
major minerals- none, all pebbles are different
coquina
type- sedimentary
class- clastic/chem/organic
texture- angular shell fragments
major minerals- calcite in shell frags
quartz sandstone
type- sedimentary
class- clastic
texture- fine to medium sand
major minerals- quartz
shale
type- sedimentary
class- clastic
texture- fine grained
major minerals- clay minerals
mudstone
type- sedimentary
class- clastic
texture- fine grained/ silty
major minerals- clay minerals
fossiliferous lime stone
type- sedimentary
class- clastic/chem/organic
texture- fossil/ angular fragments
major minerals- clacite in frags
dolostone
type- sedimentary
class chemical
texture- fine grained
major minerals- dolomite (calcite and magnesium~barely fizzes b/c of trace amounts of calcite)
limestone
type- sedimentary
class- chemical
texture- fine to med. fragments
major minerals- calcite
coal
type- sedimentary
class organic
texture- very fine grained
major minerals- none- made from carbon
oolitic limestone
type- sedimentary
class- chemical
texture- coarse sand sized ooids (round)
major minerals- calcite
*fizzes in acid
phylite
type- metamorphic
foliation- foliated
major minerals- garnet, quartz, mica
parent rock- slate/shale
meta- environment- intermediate heat/pressure = regional
arkose sandstone
type- sedimentary
class- clastic
texture- angular coarse sized pebbles
major minerals- rock fragments
conglomerate
type- sedimentary
class- clastic
texutre- large round pebble sized
major minerals- rock fragments mainly
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