Igneous and Metamorphic

Question 1

Answer 1

Obsidian

Question 2

Answer 2

Amygdaloidal Granite and Basalt

Question 3

Answer 3

Andesite

Question 4

Answer 4

Basalt

Question 5

Answer 5

Diorite

Question 6

Answer 6

Extrusive - Rhyolite and Basalt? Andesite?

Question 7

Answer 7

Foliated Gneiss

Question 8

Answer 8

Foliated Phyllite

Question 9

Answer 9

Foliated Schist

Question 10

Answer 10

Foliated Slate

Question 11

Answer 11

Fragmental Andesite

Question 12

Answer 12

Granite

Question 13

Answer 13

Gabbro

Question 14

Answer 14

Non-Foliated Marble

Question 15

Answer 15

Non-Foliated Quartzite

Question 16

Answer 16

Pegmatite Granite

Question 17

Answer 17

Pegmatite Granite

Question 18

Answer 18

Pegmatite Granite

Question 19

Answer 19

Porphoritic Granites

Question 20

Answer 20

Vesicular Pumice

Question 21

Answer 21

Vesicular Scoria

Question 22

Answer 22

Peridotite

Question 23

Answer 23

Vesicular Basalt

Question 24

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

Answer 24

Rhyolite, Andesite, Basalt

Question 25

Rhyolite Intrusive or Extrusive? Color

Answer 25

Extrusive, \> 50% light color

Question 26

Andesite Intrusive or Extrusive? Color

Answer 26

Extrusive, 50:50 light and dark

Question 27

Basalt Intrusive or Extrusive\> Color

Answer 27

Extrusive, \>50% Dark color

Question 28

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

Answer 28

Granite, Diorite, Gabbro, Peridotite

Question 29

Granite Intrusive or Extrusive? Color?

Answer 29

Intrusive, \>50% light color

Question 30

Diorite Intrusive or Extrusive? Color?

Answer 30

Intrusive, 50:50 light and dark color

Question 31

Gabbro Intrusive or Extrusive? Color?

Answer 31

Intrusive, \>50% dark color

Question 32

Peridotite Intrusive or Extrusive? Color?

Answer 32

Intrusive, Green

Question 33

Pumice Texture

Answer 33

\>40% Holes Light Grey color

Question 34

Obsidian Texture

Answer 34

Black, Black and Red color Very shiny on non-weathered area

Question 35

Scoria Texture

Answer 35

\>40% vesicles Dark red, purple, brown

Question 36

Pegmatite Texture

Answer 36

Large crystals \> 2cm in size

Question 37

Vesicular texture

Answer 37

holes in rock pumice and scoria always vesicular basalt only sometimes vesicular

Question 38

Amygdaloidal Texture

Answer 38

Vesicular texture, holes are filled with minerals

Question 39

Porphyritic Texture

Answer 39

Large crystals formed below ground Crystals are different shapes (square, triangle, hegagon) Include Fragments in color classification

Question 40

Fragmental Texture

Answer 40

Associated with volcanic explosion Fragments are jagged Do not include fragments in color classification. They are part of the volcano

Question 41

Slate

Answer 41

very fine grained splits into sheets earthy lustre tinny sound when tapped

Question 42

Phyllite

Answer 42

very fine grain silky/shiny lustre wavy surface

Question 43

Schist

Answer 43

Can see crystals wavy surface \>50% platy minerals (micas) shiny, flaking off

Question 44

Quartzite

Answer 44

no pores, feels smooth, shiny, brown sugar?

Question 45

Marble

Answer 45

no pores. smooth marbled texture? reacts with HCl

Question 46

Gneiss

Answer 46

"banded" rocks vertical light/dark lines