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Geology > Igneous and Metamorphic > Flashcards

Igneous and Metamorphic Flashcards

1
Q
A

Obsidian

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2
Q
A

Amygdaloidal Granite and Basalt

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3
Q
A

Andesite

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4
Q
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Basalt

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5
Q
A

Diorite

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6
Q
A

Extrusive - Rhyolite and Basalt? Andesite?

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7
Q
A

Foliated Gneiss

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8
Q
A

Foliated Phyllite

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9
Q
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Foliated Schist

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10
Q
A

Foliated Slate

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11
Q
A

Fragmental Andesite

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12
Q
A

Granite

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13
Q
A

Gabbro

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14
Q
A

Non-Foliated Marble

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15
Q
A

Non-Foliated Quartzite

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16
Q
A

Pegmatite Granite

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17
Q
A

Pegmatite Granite

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18
Q
A

Pegmatite Granite

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19
Q
A

Porphoritic Granites

20
Q
A

Vesicular Pumice

21
Q
A

Vesicular Scoria

22
Q
A

Peridotite

23
Q
A

Vesicular Basalt

24
Q

Aphantic (Extrusive) Textures, in order of light to dark

A

Rhyolite, Andesite, Basalt

25
Q

Rhyolite

Intrusive or Extrusive?

Color

A

Extrusive, > 50% light color

26
Q

Andesite

Intrusive or Extrusive?

Color

A

Extrusive, 50:50 light and dark

27
Q

Basalt

Intrusive or Extrusive>

Color

A

Extrusive, >50% Dark color

28
Q

Phaneritic (Intrusive) Textures in order of light to dark colors

A

Granite, Diorite, Gabbro, Peridotite

29
Q

Granite

Intrusive or Extrusive?

Color?

A

Intrusive, >50% light color

30
Q

Diorite

Intrusive or Extrusive?

Color?

A

Intrusive, 50:50 light and dark color

31
Q

Gabbro

Intrusive or Extrusive?

Color?

A

Intrusive, >50% dark color

32
Q

Peridotite

Intrusive or Extrusive?

Color?

A

Intrusive, Green

33
Q

Pumice Texture

A

>40% Holes

Light Grey color

34
Q

Obsidian Texture

A

Black, Black and Red color

Very shiny on non-weathered area

35
Q

Scoria Texture

A

>40% vesicles

Dark red, purple, brown

36
Q

Pegmatite Texture

A

Large crystals > 2cm in size

37
Q

Vesicular texture

A

holes in rock

pumice and scoria always vesicular

basalt only sometimes vesicular

38
Q

Amygdaloidal Texture

A

Vesicular texture, holes are filled with minerals

39
Q

Porphyritic Texture

A

Large crystals formed below ground

Crystals are different shapes (square, triangle, hegagon)

Include Fragments in color classification

40
Q

Fragmental Texture

A

Associated with volcanic explosion

Fragments are jagged

Do not include fragments in color classification. They are part of the volcano

41
Q

Slate

A

very fine grained

splits into sheets

earthy lustre

tinny sound when tapped

42
Q

Phyllite

A

very fine grain

silky/shiny lustre

wavy surface

43
Q

Schist

A

Can see crystals

wavy surface

>50% platy minerals (micas)

shiny, flaking off

44
Q

Quartzite

A

no pores, feels smooth, shiny, brown sugar?

45
Q

Marble

A

no pores. smooth marbled texture?

reacts with HCl

46
Q

Gneiss

A

“banded” rocks

vertical light/dark lines

47
Q
A

Geology (3 decks)

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