GEOLOGY

Question 1

what cleavage or fracture does quartz have?

Answer 1

no cleavage, conchoidal fracture (shell like)

Question 2

what does quartz metamorphise into?

Answer 2

quartzite (non foliated)

Question 3

will a nail scratch quartz, whats the hardness?

Answer 3

no hardness of 7

Question 4

what types of rock is quartz found in

Answer 4

felsic to intermediate
most metamorphic rocks

Question 5

what is regional metamorphism

Answer 5

associated with mountain building (orogenesis) and is widespread

Question 6

what fracture does garnet have

Answer 6

conchoidal

Question 7

what cleavage do micas have

Answer 7

1 perfect cleavage

Question 8

what igneous rocks have micas

Answer 8

felsic such as diorite, granite, rhyolite and andesite

Question 9

what cleavage does Kfs have

Answer 9

3 perfect cleavages at 120˚

Question 10

what twinning is Kfs

Answer 10

simple

Question 11

what colour is kfs

Answer 11

pinkish

Question 12

where igneous rocks have Kfs

Answer 12

felsic

Question 13

what cleavage does plagioclase have

Answer 13

2 perfect at 90˚

Question 14

what twinning does plagioclase have

Answer 14

multiple twinning

Question 15

what colour is plagioclase usually found

Answer 15

white

Question 16

what igneous rocks have plagioclase

Answer 16

basically all of them

Question 17

what colour and shape is ampibole

Answer 17

dark coloured with long bladed crystals

Question 18

what cleavage does amphibole have

Answer 18

120/60˚

Question 19

what igneous rocks have amphibole

Answer 19

felsic to mafic

Question 20

what cleavage does pyroxene have

Answer 20

two perfect 90˚

Question 21

what colour is pyroxene

Answer 21

dark coloured green

Question 22

what shape is pyroxene

Answer 22

stubby prismatic boxy

Question 23

what colour is olivine

Answer 23

lighter green

Question 24

what cleavage or fracture does olivine have

Answer 24

conchoidal fracture

Question 25

what shape does olivine have

Answer 25

tabular shaped

Question 26

what igneous rocks have olivine

Answer 26

mafic to ultramafic rocks such as basalt, peridotite.

Question 27

what minerals are found in granite

Answer 27

pink = feldspar white = plagioclase translucent = quartz black = muscovite

Question 28

where is granite found

Answer 28

continental crust, convergent boundaries or tectonic activity that makes mountains

Question 29

what texture does granite have

Answer 29

phaneritic

Question 30

is granite plutonic or volcanic

Answer 30

plutonic (coarse grained - cooled slowly)

Question 31

what minerals are found in rhyolite

Answer 31

quartz, plagioclase, Kfs and micas

Question 32

what is the silica content of granite and rhyolite

Answer 32

>60%

Question 33

is rhyolite plutonic or volcanic

Answer 33

volcanic (fine grained - cools rapidly)

Question 34

what minerals are present in diorite

Answer 34

white tabular = plagioclase black elongate = amphibole glassy = quartz

Question 35

what is the texture and grain size of diorite

Answer 35

phaneritic and coarse

Question 36

what minerals are present in andesite

Answer 36

amphiboles, plagioclase, quartz and micas

Question 37

what is the texture and colour of andesite

Answer 37

darker coloured aphanitic

Question 38

what minerals are present in gabbro

Answer 38

plagioclase, pyroxenes, amphiboles

Question 39

what texture and grain size is gabbro

Answer 39

coarse grain phaneritic

Question 40

what minerals are present in basalt

Answer 40

olivine, plagioclase phenocrysts, amphiboles, pyroxenes

Question 41

what texture and colour is basalt

Answer 41

dark coloured, fine grained aphanitic or porphyritic if it has phenocrysts

Question 42

what minerals are in peridotite

Answer 42

olivine, pyroxene

Question 43

what texture is peridotite

Answer 43

phaneritic, coarse grained

Question 44

what are distinguishing features of garnet

Answer 44

conchoidal fracture, bright red and found in many high grade metamorphic rocks

Question 45

what are features of andalusite

Answer 45

organgish, elongated prisms, in low grade metamorphism

Question 46

what are features of kyanite

Answer 46

associated with regional metamorphism, bladed prisms, blue colour

Question 47

what are features of sillimanite

Answer 47

colourless to white, bladed prisms, associated with regional metamorphism

Question 48

what are the two calcareous metamorphic minerals

Answer 48

epidote and wollanstonite

Question 49

what are features of epidote

Answer 49

green and rocks that are hydrothermally metamorphosed

Question 50

wollastonite features:

Answer 50

two perfect cleavages and associated with contact metamorphism. formation by quartz and calcite calcium silicate hornfels

Question 51

what are the 3 aluminosilicates in order of least to greatest

Answer 51

andalusite, kyanite and sillimanite

Question 52

what are the phylosilicate metamorphic minerals

Answer 52

serpentine and talc

Question 53

distinguishing features of chlorite

Answer 53

greenish colour, associated with low grade metamorphism

Question 54

what are the minerals of slate

Answer 54

muscovite Kfs quartz chlorite

Question 55

what are the 4 foliated rocks

Answer 55

slate, phyllite, schist and gneiss

Question 56

what are the features of slate

Answer 56

slaty cleavage, very fine grained, minerals so fine unable to see

Question 57

what are the features of phyllite

Answer 57

garnet bearing, muscovite that has been foliated, sheen on slaty cleavage, fine grained, low grade regional metamorphism

Question 58

what are the features of schist

Answer 58

fine to medium grained, schistosity, with micas, wavy shiny texture,

Question 59

what is the protolith to phyllite

Answer 59

siltstone, mudstone or shale

Question 60

what minerals are present in schist

Answer 60

micas, chlorites, quartz and garnets

Question 61

what does shale turn into if its subject to low grade contact metamorphism

Answer 61

hornfels

Question 62

what are the features of gneiss

Answer 62

garnet, sillimanites, pyroxene, gneiss banding

Question 63

protoliths to gneiss

Answer 63

shale or granite under regional high grade metamorphism

Question 64

what are the features of sillimanite gneiss

Answer 64

dominantly sillimanite, serpentine, rich in aluminium with bladed crystal banding

Question 65

kyanite schist features

Answer 65

blue white elongated crystals: kyanite black platy with perfect cleavage: biotite regional high grade metamorphism

Question 66

features of granitic gneiss

Answer 66

gneissic banding with quartz, micas, Kfs and plagioclase

Question 67

what are the features of serpentine group

Answer 67

fibrous, green coloured

Question 68

sillimanite gneiss minerals:

Answer 68

sillimanite, quartz, biotite, feldspars and garnet

Question 69

features of andalusite hornfels

Answer 69

andalusite, biotite, coarse grained. protolith is mudstone

Question 70

can molybdenite be found in placer deposits with gold and or cassiterite

Answer 70

no because moly is relatively easy to weather and erode, lower specific gravity compared to the other two.

Question 71

features of galena

Answer 71

cubic, heavy, perfect 3 cleavages and bright metallic lustre

Question 72

features of pyrite

Answer 72

brass yellow colour, fools gold

Question 73

Chalcopyrite features

Answer 73

multi coloured usually brass yellow colour, brittle fracture

Question 74

sphalerite features

Answer 74

range of colours but usually transparent, fractures are uneven

Question 75

features of molybdenite

Answer 75

bluish - silver platy mineral habit