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GLE Reviews > Diagnostic Test 1 - D2 > Flashcards

Diagnostic Test 1 - D2 Flashcards

1
Q

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

A

Anhedral

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2
Q

Brazil Law is a common type of twinning in which mineral? *
plagioclase
orthoclase
pyroxene
quartz

A

Qtz

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3
Q

In which atomic model do electrons orbit around the nucleus? *
Bohr’s Model
Rutherford’s Model
Thomson’s Model
Dalton’s Model

A

Bohr

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4
Q

Which of the following DOES NOT belong to the Lanthanide Series? *
cerium
europium
ytterbium
uranium

A

Uranium

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5
Q

Who classified elements based on their behavior in a
hypothetical iron alloy-silicate-sulfide-gas system? *
Agricola
Goldschmidt
Bowen
Sorby

A

Goldschmist

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6
Q

This defect occur when an atom is displaced
from the position it normally occupies to an
interstitial site. *
Schottky
Frenkel
Edge dislocation
Screw dislocation

A

Frenkel

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7
Q

Which of the following is NOT a feldspathoid? *
leucite
nepheline
sanidine
sodalite

A

Sanidine

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8
Q

Which of the following minerals DOES NOT contain titanium in its chemical formula? *
akermanite
ilmenite
rutile
titanite

A

Akermanite

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9
Q

Scheelite is a mineral under which class? *
chromates
vanadates
tungstates
phosphates

A

tungstates

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10
Q

Which of the following minerals is under the scapolite group? *
cordierite
heulandite
tridymite
analcime

A

heulandite

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11
Q

Which of the following minerals is a nesosilicate? *
tremolite
enstatite
akermanite
forsterite

A

forsterite

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12
Q

What is the Si:O ratio of phyllosilicates? *
2:5
4:11
1:3
1:2

A

2;5

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13
Q

What is the luster of sphalerite? *
resinous
vitreous
greasy
adamantine

A

resinous

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14
Q

Very small amounts of which metal in the crystal structure of ruby gives itsdeep red color?
zinc
iron
titanium
chromium

A

chromium

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15
Q

The following minerals has a streak color of shades of yellow, EXCEPT:
orpiment
zincite
sulfur
chrysocolla

A

chrysocolla

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16
Q

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

A

phosphorescence

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17
Q

Which variety of K-feldspar exhibit opalescence? *
amazonite
moonstone
sunstone
spectrolite

A

moonstone

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18
Q

Which term is used to describe a mineral habit that is needle-like? *
acicular
capillary
filiform
reticulated

A

acicular

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19
Q

This term describes a mineral of which it is capable of being drawn into a wirelike shape. *
malleable
brittle
sectile
ductile

A

ductile

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20
Q

Which of the following asbestiform minerals is also known as a blue asbestos? *
chrysotile
crocidolite
amosite
actinolite

A

crocidolite

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21
Q

The silica content of basic rocks is: *
40-45%
45-52%
52-60%
60-66%

A

45-52%

22
Q

This term describes a rock that is generally light in color. *
melanocratic
autocratic
leucocratic
authigenic

A

leucocratic

23
Q

Given: A = 20%, B = 40%, C = 10%. After normalization, the value of A becomes: *
28%
29%
30%
31%

A

29%

24
Q

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

A

Quartz Monzodiorite

25
Q

A phaneritic rock has an unnormalized mode of more than 90% plagioclase. This rock is classified as: *
diorite
gabbro
anorthosite
dunite

A

anorthosite

26
Q

What is the aphanitic equivalent of syenite? *
rhyolite
latite
phonolite
trachyte

A

trachyte

27
Q

What is the plutonic equivalent of dacite? *
granodiorite
syenite
monzonite
monzodiorite

A

granodiorite

28
Q

Which of the following is NOT a type of peridotite? *
Harzburgite
Lherzolite
Dunite
Websterite

A

Websterite

29
Q

In the TAS diagram, the basaltic trachyandesite is subdivided into: *
mugearite and shoshonite
hawaiite and potassic trachybasalt
benmoreite and latite
trachyte and trachyandesite

A

mugearite and shoshonite

30
Q

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

A

lapilli tuff

31
Q

Liparite is a synonym for the rock: *
troctolite
rhyolite
andesite
diorite

A

rhyolite

32
Q

A medium-grained gabbro is also known as: *
diabase
boninite
norite
plagiogranite

A

diabase

33
Q

A diverse group of dark, porphyritic, mafic to ultramafic K-rich hypabyssal rocks.
*
lamproite
lamprophyre
jotunite
ijolite

A

lamprophyre

34
Q

A very high degree of undercooling produces a: *
glassy rock
phaneritic rock
aphanitic rock
porphyritic rock

A

glassy rock

35
Q

A Rapaviki texture can be observed in: *
andesite
komatiite
granite
basalt

A

granite

36
Q

A tactite is typically formed in: *
hydrothermal metamorphism
fault-zone metamorphism
contact metamorphism
impact metamorphism

A

contact metamorphism

37
Q

An altered basalt in which plagioclase is “albitized” as the basalts exchange Ca for Na in seawater. *
greisen
spilite
fenite
listwanite

A

spilite

38
Q

A green and red metamorphic rock that contains clinopyroxene and garnet (omphacite pyrope). The protolith is typically basaltic.
*
granulite
eclogite
amphibolite
greenschist

A

eclogite

39
Q

Which of the following can be a protolith of an orthogneiss? *
sandstone
limestone
granite
mudstone

A

granite

40
Q

A cohesive and foliated fault-zone rock having 50-70% fine matrix. *
protomylonite
mylonite
ultramylonite
blastomylonite

A

mylonite

41
Q

Which accessory plate is usually marked with 1/4λ? *
gypsum plate
Quartz sensitive tint
mica plate
quartz wedge

A

mica plate

42
Q

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

A

indicatrix

43
Q

The minerals that crystallize in the following crystal systems have two optic axes, EXCEPT: *
orthorhombic
monoclinic
tetragonal
triclinic

A

tetragonal

44
Q

In an indicatrix, the line perpendicular to the optic plane is called the: *
optic normal
optic angle
acute bisectrix
obtuse bisectrix

A

optic normal

45
Q

The point in an interference figure corresponding to the direction of an optic axis in the crystal section.
*
isochrome
isogyre
melatope
bisectrix

A

melatope

46
Q

Rudite is a Latin word used to describe which type of clast? *
clay
silt
sand
gravel

A

gravel

47
Q

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

A

1 - 2 mm

48
Q

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

A

Orthoconglomerates

49
Q

Which type of sandstone contains <75% quartz, and feldspar has more than fragments of rock? *
quartz arenite
lithic arenite
arkosic arenite
sublithic arenite

A

Arkosic arenite

50
Q

A rank of coal that has a carbon content of 71-77%. *
anthracite
bituminous
subbituminous
lignite

A

subbituminous

GLE Reviews (11 decks)

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