Chapter 4,5,6

Question 1

What are the percentages of igneous rocks?

Answer 1

70% felsic 50% mafic SiCo2 60%

Question 2

Are igneous rocks mafic or ultra mafic

Answer 2

Ultra mafic 40%

Question 3

Where’s does Magma cool in igneous rock?

Answer 3

It cools on continental crust

Question 4

Which rock will be considered more mafic , in continental crust or ocean crust

Answer 4

Ocean crust will be more mafic

Question 5

What determines whether a rock is more mafic?

Answer 5

How it cools determines it and the cooling is determined by the texture and mineral composition

Question 6

What are the two types of igneous environment

Answer 6

Intrusive and extrusive and they create distinct rock textures

Question 7

How does extrusive rocks cool

Answer 7

They cool rapidly or near surface so crystals are not large

Question 8

What is an example of extrusive rock

Answer 8

Alphanetic fine grained texture

Question 9

Intrusive rocks

Answer 9

Cool slowly at depth , crystallization occur as over a long time growing large crystals

Question 10

What is an example of intrusive rock

Answer 10

Phaneritic coarse grained texture

Question 11

What is the exception for cooling ?

Answer 11

It can cool slowly in continental crust or ocean crust , phonetic and aphantic doesn’t have to do with where

Question 12

what are crystalline rocks classified by?

Answer 12

Texture and composition

Question 13

What are four types of aphantic rocks

Answer 13

Rhyolite andesite basalt and komatite

Question 14

What are four types of phaneretic

Answer 14

Granite , diorite , gabbro and peridotite

Question 15

What happens when magma cools slowly

Answer 15

It creates more crystals and minerals be cause it has time to form crystals

Question 16

What happens when magma cools quickly

Answer 16

When it cools quickly it does not ha e time to firm all the minerals so it is a fine grained rock

Question 17

Where does magma form?

Answer 17

.

Question 18

Why does magma form ?

Answer 18

.

Question 19

What is decompressional melting

Answer 19

Decrease in pressure

Question 20

What is hear transfer ?

Answer 20

Solid rocks going into liquid phase and can firm magma and hot spot

Question 21

Wet flux melt

Answer 21

Moves rock from solid to partially melted phase to create magma , release of water from subduction

Question 22

What determines what magma looks like?

Answer 22

Where is forms

Question 23

Partial melting

Answer 23

Melting mostly felsic , rocks rarely melt completely Instead only a portion melts ; it is silica Rich

Question 24

Magma mixing

Answer 24

If they Mix together it can change the composition.

Question 25

Fractional crystallization

Answer 25

As it cools ultra mafic forms first

Question 26

What rocks crystallize first ?

Answer 26

Felsic rocks

Question 27

How does magma form?

Answer 27

By reducing pressure on a rock

Question 28

Where can magma in an igneous rock can form

Answer 28

Decompressional mantling divergent boundary @ ocean crust

Question 29

What creates the onset of melting

Answer 29

A drop in pressure on the rock

Question 30

Where would you see flux melting / wet melting

Answer 30

Convergent boundary with subduction

Question 31

Heat transfer

Answer 31

Increases in temperature labeled as hot spots

Question 32

Decompressional melt forms at what boundary

Answer 32

Divergent

Question 33

Flux / wet melt

Answer 33

Convergent with subduction

Question 34

Heat transfer

Answer 34

Hot spot

Question 35

What happens in partial melting

Answer 35

Felsic rocks melt first

Question 36

Cooling process

Answer 36

Minerals form through cooling minerals melt first or mafic minerals olive

Question 37

Assimilation

Answer 37

Magma melts wall rock it passes through complete melting of xenol alters magma composition magma tells and dissolve

Question 38

Does continental or ocean crust have more silica ?

Answer 38

Continental crust has more silica and gasses more felsic magma which releases gas violently , and falls on itself which can from a. Strato or composite volcano

Question 39

What is sedimentary rock

Answer 39

rock that forms near or at the surface of the earth

Question 40

How does a sedimentary rock form

Answer 40

by cementing loose clasts that are produced from physical or chemical weathering of pre existing rocks

Question 41

Clastic Sedimentary

Answer 41

solid fragments and grains broken prexisting rocks

Question 42

How do clastic rocks form

Answer 42

Weathering, erision, transporation, desposition, and lithification

Question 43

weathering

Answer 43

clasts form by disintegration into separate rocks through physical and chemical weathering

Question 44

erosion

Answer 44

refers to the combination of processes that separate rocks

Question 45

transportation

Answer 45

_

Question 46

desposition

Answer 46

is the process by which sediment settles out of transporting medium

Question 47

Lithification

Answer 47

has compaction and cementation.**

Question 48

Four types of major sedimentary rocks

Answer 48

Clastic, Biochemical, organic , and chemical

Question 49

Clastic rocks

Answer 49

Form from cemented together grains and go to the process of weathering, erosion, transportation, deposition and lithification

Question 50

Biochemical Rcoks

Answer 50

develop from shells of organisms

Question 51

Organic rocks

Answer 51

consists of plant debris or of altered plant debris or plankton

Question 52

Four types of clastic rocks

Answer 52

Breccia, conglomerate, sandstone (quartz) and shale

Question 53

What does a sedimentary structure include

Answer 53

bedding , cross bedding, ripple marks, dunes and mud cracks