Diagnostic Test 1 - D2 Flashcards
A crystal that lacks well-developed crystal faces
or that has rounded or irregular form due to crowding by
adjacent crystals. *
Euhedral
Subhedral
Anhedral
Polyhedral
Anhedral
Brazil Law is a common type of twinning in which mineral? *
plagioclase
orthoclase
pyroxene
quartz
Qtz
In which atomic model do electrons orbit around the nucleus? *
Bohr’s Model
Rutherford’s Model
Thomson’s Model
Dalton’s Model
Bohr
Which of the following DOES NOT belong to the Lanthanide Series? *
cerium
europium
ytterbium
uranium
Uranium
Who classified elements based on their behavior in a
hypothetical iron alloy-silicate-sulfide-gas system? *
Agricola
Goldschmidt
Bowen
Sorby
Goldschmist
This defect occur when an atom is displaced
from the position it normally occupies to an
interstitial site. *
Schottky
Frenkel
Edge dislocation
Screw dislocation
Frenkel
Which of the following is NOT a feldspathoid? *
leucite
nepheline
sanidine
sodalite
Sanidine
Which of the following minerals DOES NOT contain titanium in its chemical formula? *
akermanite
ilmenite
rutile
titanite
Akermanite
Scheelite is a mineral under which class? *
chromates
vanadates
tungstates
phosphates
tungstates
Which of the following minerals is under the scapolite group? *
cordierite
heulandite
tridymite
analcime
heulandite
Which of the following minerals is a nesosilicate? *
tremolite
enstatite
akermanite
forsterite
forsterite
What is the Si:O ratio of phyllosilicates? *
2:5
4:11
1:3
1:2
2;5
What is the luster of sphalerite? *
resinous
vitreous
greasy
adamantine
resinous
Very small amounts of which metal in the crystal structure of ruby gives itsdeep red color?
zinc
iron
titanium
chromium
chromium
The following minerals has a streak color of shades of yellow, EXCEPT:
orpiment
zincite
sulfur
chrysocolla
chrysocolla
It is the ability of minerals to give off visible light when they are struck by energy of a shorter wavelength even after the energy source is turned off. *
fluorescence
phosphorescence
thermoluminescence
triboluminescence
phosphorescence
Which variety of K-feldspar exhibit opalescence? *
amazonite
moonstone
sunstone
spectrolite
moonstone
Which term is used to describe a mineral habit that is needle-like? *
acicular
capillary
filiform
reticulated
acicular
This term describes a mineral of which it is capable of being drawn into a wirelike shape. *
malleable
brittle
sectile
ductile
ductile
Which of the following asbestiform minerals is also known as a blue asbestos? *
chrysotile
crocidolite
amosite
actinolite
crocidolite
The silica content of basic rocks is: *
40-45%
45-52%
52-60%
60-66%
45-52%
This term describes a rock that is generally light in color. *
melanocratic
autocratic
leucocratic
authigenic
leucocratic
Given: A = 20%, B = 40%, C = 10%. After normalization, the value of A becomes: *
28%
29%
30%
31%
29%
A phaneritic rock has the following mode: 13% quartz, 45% plagioclase, 23% orthoclase, 5% biotite, 10% hornblende, and 4% others. This rock is therefore classified as: *
Monzodiorite
Monzonite
Quartz Monzonite
Quartz Monzodiorite
Quartz Monzodiorite
A phaneritic rock has an unnormalized mode of more than 90% plagioclase. This rock is classified as: *
diorite
gabbro
anorthosite
dunite
anorthosite
What is the aphanitic equivalent of syenite? *
rhyolite
latite
phonolite
trachyte
trachyte
What is the plutonic equivalent of dacite? *
granodiorite
syenite
monzonite
monzodiorite
granodiorite
Which of the following is NOT a type of peridotite? *
Harzburgite
Lherzolite
Dunite
Websterite
Websterite
In the TAS diagram, the basaltic trachyandesite is subdivided into: *
mugearite and shoshonite
hawaiite and potassic trachybasalt
benmoreite and latite
trachyte and trachyandesite
mugearite and shoshonite
A pyroclastic rock is composed of the following fragments: 20% blocks, 40% lapilli, and 40% ash. This rock is classified as: *
lapilli tuff
lapilli-stone
tuff
tuff breccia
lapilli tuff
Liparite is a synonym for the rock: *
troctolite
rhyolite
andesite
diorite
rhyolite
A medium-grained gabbro is also known as: *
diabase
boninite
norite
plagiogranite
diabase
A diverse group of dark, porphyritic, mafic to ultramafic K-rich hypabyssal rocks.
*
lamproite
lamprophyre
jotunite
ijolite
lamprophyre
A very high degree of undercooling produces a: *
glassy rock
phaneritic rock
aphanitic rock
porphyritic rock
glassy rock
A Rapaviki texture can be observed in: *
andesite
komatiite
granite
basalt
granite
A tactite is typically formed in: *
hydrothermal metamorphism
fault-zone metamorphism
contact metamorphism
impact metamorphism
contact metamorphism
An altered basalt in which plagioclase is “albitized” as the basalts exchange Ca for Na in seawater. *
greisen
spilite
fenite
listwanite
spilite
A green and red metamorphic rock that contains clinopyroxene and garnet (omphacite pyrope). The protolith is typically basaltic.
*
granulite
eclogite
amphibolite
greenschist
eclogite
Which of the following can be a protolith of an orthogneiss? *
sandstone
limestone
granite
mudstone
granite
A cohesive and foliated fault-zone rock having 50-70% fine matrix. *
protomylonite
mylonite
ultramylonite
blastomylonite
mylonite
Which accessory plate is usually marked with 1/4λ? *
gypsum plate
Quartz sensitive tint
mica plate
quartz wedge
mica plate
A geometric figure that shows the index of refraction and vibration direction for light passing in any direction through a material. *
indicatrix
Becke Line
interference figure
optic axis
indicatrix
The minerals that crystallize in the following crystal systems have two optic axes, EXCEPT: *
orthorhombic
monoclinic
tetragonal
triclinic
tetragonal
In an indicatrix, the line perpendicular to the optic plane is called the: *
optic normal
optic angle
acute bisectrix
obtuse bisectrix
optic normal
The point in an interference figure corresponding to the direction of an optic axis in the crystal section.
*
isochrome
isogyre
melatope
bisectrix
melatope
Rudite is a Latin word used to describe which type of clast? *
clay
silt
sand
gravel
gravel
In the Wentworth scale, what is the size of very coarse sand? *
0.5 - 1 mm
1 - 2 mm
2 - 4 mm
4 - 64 mm
1 - 2 mm
This is a term used to describe firmly cemented coarse-grained clastics that are characterized by clasts support, and mainly composed of pebbles of gravel dimension and not more than 15% fine-grained matrix of argillaceous, and clayey detritus.
*
Oligomict conglomerates
Orthoconglomerates
Petromict conglomerates
Paraconglomerates
Orthoconglomerates
Which type of sandstone contains <75% quartz, and feldspar has more than fragments of rock? *
quartz arenite
lithic arenite
arkosic arenite
sublithic arenite
Arkosic arenite
A rank of coal that has a carbon content of 71-77%. *
anthracite
bituminous
subbituminous
lignite
subbituminous
