Geo ( Metamorphic & Igneous)

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49 Terms

1
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The latin word “______” meaning fire.

Ignis

2
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It is based on size, shape, arrangement and degree of crystallinity.

Texture

3
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The minerals present in this rock type are Pyroxene, amphibole olivine, biotite.

Gabbro/ Basalt

4
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Give one example of intrusive rocks.

Granite/ Diorite/ Gabbro/ Peridotite

5
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Large igneous bodies deep beneath the Earth.

Pluton

6
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Nearly vertical structure that cuts across pre-existing layering.

Dike

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Nearly horixontal structure injected between pre-existing layering.

Sill

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Dome-shaped intrusion

Laccolith

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Lenticular intrusion with a depressed central region.

Lopolith

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Angular clast (greater than 64 mm)

Blocks

11
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Rounded clast (greater than 64 mm)

Bombs

12
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Igneous rocks that are 2-64 mm in diameter.

Lapilli

13
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Igneous rocks that are 2 mm in diameter.

Ash

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Fragments of rocks.

Lithic

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Glassy fragments

Vitric

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Measurements of the fragments of rocks erupted by a volcano

Pyroclastic size

17
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The magma type of Andesitic ranges from _____ to _____ temperature.

900 degree C - 1000 degree C

18
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The viscosity of an ultrabasic magma is called ______.

Low to very low

19
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Ultramafic, mafic and felsic are _____ terms.

Color

20
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This is formed when there is decrease in pressure, addition of volatiles or hear transfer from rising magma.

Magma

21
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Determines the percentage of dark-colored and light colored minerals.

Composition

22
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Based on completeness of crystal form and size.

Crystal form

23
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The depth of this structire is greater than 100km²

Batholith

24
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What do you call a crystal form that has complete crystal faces.

Euhedral

25
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It has no observable crystal faces.

Anhedral

26
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It is the force applied to a rock.

Stress

27
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Metamorphism begins at what temperature

150-200°C

28
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Metamorphic minerals that forms only under netamorphic temperature and pressures.

Mineral Assemblage

29
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A chemical and mineral composition alteration of rocks by reactions with hydrothermal fluids

Metasomatism

30
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This path indicates decreasing temperatures and pressures as rock is carried toward

Earth's surface.

Retrogade

31
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A mixture of igneous rock and relict of metamorphic rock

Migmatite

32
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 Textural change to a pre-existing "parent rock” or protolith

Metamorphism

33
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Repetitive layering due to preferred mineral orientation

foliation

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The increase in temperature with increasing depth in Earth's interior

Geothermal Gradient

35
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A part of Metamorphic processes where formation of new metamorphic mineral crystals

Neocrystallization

36
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It is a metamorphic process that change in grain shape and size only

Recrystallization

37
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Force applied in a particular direction (shearing)

Differential stress

38
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Are non-foliated metamorphic rocks

Granoblastic

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Force applied equally in all directions (compression)

Confining Stress

40
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Dark and light layers of colored minerals

Compositional banding

41
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 Preferred orientation of large mica flakes

Schistosity

42
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Distinctive arrangements of mineral grains not found in other rock types

metamorphic texture

43
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Rock groups with varying mineral compositions formed under particular conditions of temperature and pressure from different parent rocks.

Metamorphic Facies

44
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What are the 2 types of divergent plate boundaries

Contact metamorphism & Seafloor Metamorphism

45
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It refers to the degree of metamorphic change a rock has undergone, which correlates with changes in mineral composition and textures pressure and temperature increases

Metamorphic grade

46
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Mineral grains dissolve producing ions that migrate then precipitate elsewhere

Pressure solutions

47
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One mineral transforms to another mineral with the same composition but different crystal structure

Phase change

48
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Same combination of minerals occur due to metamorphism


Metamorphic zone

49
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It forms within a limited range of temperatures and pressures

index minerals