Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Alevel Geology > Igneous Rocks > Flashcards

Igneous Rocks Flashcards

1
Q

Igneous rock

A

Any rock that has formed from a molten material

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Euhedral Crystal

A

Good crystal faces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Equant crystals

A

Crystals have all axis the same length

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Sub-equant crystals

A

Crystals where all axis are almost the same length

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Prismatic crystals

A

Crystals have 4 or more sides then same length elongated in 1 direction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Anhedral crystals

A

Poorly formed crystal faces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Sub-hedral crystals

A

Some well formed crystal faces and some poorly formed faces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Igneous texture

A

The overall view of crystal size and shape

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Equicrystaline texture

A

Equal size crystals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Vesicular texture

A

Bubbles trapped in lava

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Amygdaloidal texture

A

Infilled vesicles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Flow banding

A

Layers of dark and light minerals aligned due to separation in the lava flow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Porphyritic texture

A

2 distinct crystal faces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Ophilitic texture

A

Elongated crystal enclosed in another crystal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Cumulative texture

A

Crystals which have settled out of magma

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Magma

A

Molten rock underground

17
Q

Lava

A

Molten rock above ground

18
Q

The melting point of silicic material

A

800°c

19
Q

Enclave

A

Boobs of magma surrounded by magma of a different comp

20
Q

Exsolition

A

Brought out of solution

21
Q

Intrusive igneous rock

A

These crystallise below the surface to form structures called intrusions

22
Q

Concordant intrusion

A

Intrudes along bedding planes

23
Q

Discordant intrusion

A

Cuts across bedding planes

24
Q

Country rock

A

Rocks that magma intrudes

25
Q

Sill

A

Sheet like concordant intrusions

26
Q

Dyke

A

Sheet like discordant intrusions

27
Q

Ring complex

A

Dykes that form ring like structures

28
Q

Come sheets

A

Pressure from magma forcing upwards fractures that fill with magma

29
Q

Ring dyke

A

Magma forced along faults

30
Q

Volcanic plug

A

Magma crystallising in the volcano vent

31
Q

Chilled margin

A

When he edge of the igneous intrusion next to the country rock rapidly cools allowing small crystals to form

32
Q

Baked margin

A

The area of the country rock adjacent to a minor intrusion that gets altered by the heat from the intrusion

Alevel Geology (9 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions