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Take Test: Lab 5 – Metamorphic Rock

Test Information
Description

Instructions

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QUESTION 1

Metamorphic Rock Identification

Instructions
Observe and record the texture, and composition of each of the rock
specimens provided. Describe your own observations; do NOT
simply copy the composition or texture shown in your laboratory
manual. With the texture and compositional information identify
each of the rocks, and then look up the probable parent rocks in your
laboratory manual, textbook, or using the table shown below.
Use the following guidelines for completing your Metamorphic
Rock Identification Form below:
1. Texture – The term texture refers to the size, shape, and
orientation of the minerals, particles, and other substances that make
up a rock. There are two major textural groups in metamorphic
rocks:
a. Foliated – In this texture, the mineral crystals in the rock are
aligned with each other. This alignment may be displayed as
parallel planes along which the rock splits, by overlapping sheets of
platy minerals such as micas and chlorite, or by alternating layers of
light and dark minerals. Foliation is seen in metamorphic rocks that
have minerals with elongate crystals that grow perpendicular to the
direction of tectonic stress. This is particularly evident in mica and
amphibole minerals.
Foliated texture is further subdivided based on the presence or
absence of pronounced color banding in the rock. Rocks without
distinct alternating bands of light and dark minerals are described as
non-color banded, whereas rocks with alternating bands of dark
and light minerals are described as color banded. Color banding is
also referred to as gneissic foliation. Foliated textures are further
described on the basis of the grain (crystal) size in the rock.
Examples of complete descriptions of foliated metamorphic rocks
include: “foliated, non-color banded, very fine-grained” for slate,
“foliated, color-banded, coarse-grained” for gneiss, and “foliated,
non-color banded, fine-grained” for phyllite.
b. Nonfoliated – In this texture, the mineral crystals in the rock
have grown in many directions and most do not show alignment. As
a result, nonfoliated rocks commonly appear massive and
structureless with only a few lines of impurities through the rock.
These rocks may break across, rather than around, mineral grains to
produce a scaly surface on the specimen. Nonfoliated textures are
further described on the basis of the grain (crystal) size in the rock.
Examples of complete descriptions of nonfoliated metamorphic
rocks include “nonfoliated, medium-grained” for a quartzite, and
“nonfoliated, coarse-grained” or “nonfoliated, medium-grained” for
marble.

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A.

B.

C.

D.

You may find the Recognition of Metamorphic Rock Textures flow
chart useful in identifying textures in metamorphic rocks.

2. Composition – Indicate the mineral composition of the rock
based on observations with a hand lens and, if needed, physical or
chemical tests. Identify and list all visible minerals present,
including the color of each mineral.
3. Rock Name – Use the Classification of Metamorphic Rocks
chart to determine the name for each of the rocks. For schists,
include the dominant or distinctive visible mineral. Examples of
some of the names given to schists include garnet schist, chlorite
schist, biotite schist, and muscovite schist.
4. Probable Parent Rock(s) – All metamorphic rocks are
formed by the action of heat and/or pressure on pre-existing
igneous, sedimentary, or metamorphic rocks. The pre-existing rock
is called either the parent rock or the protolith. Refer to Table
7.2 on page 186 of your textbook and to Section 7.5 on pages 186-
187 of your laboratory manual or to the figure below for parent
rock(s). Indicate the name(s) of the probable parent rock(s) in the
last column of the metamorphic rock identification form.

1. What are the two main types of metamorphic rock textures?

Foliated and nonfoliated

Metamorphic and non-metamorphic

Fine-grained and coarse-gained

Clastic and biochemical

QUESTION 2

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A.

B.

Sample 1:
What is the texture of this metamorphic rock?

Foliated

Nonfoliated

A.

B.

C.

D.

E.

QUESTION 3

Material Mineral Scratched
Fingernail No 2.5
Copper Coin Yes 3.2
Knife Blade Yes 5.1
Window Glass Yes 5.5
Steel File Yes 6.5

Sample 1
Streak: White
Relative Hardness

H = 3.0
Breakage: See question below
Mineral Color: Colorless or white, yellow, red, purple, brown, gray,
etc. or other colors due to impurities
Specific Gravity: 2.71 – Density low
Luster: Nonmetallic
Other Properties: Reacts vigorously in contact with dilute
hydrochloric acid (HCl)

Gypsum

Talc

Calcite

Muscovite

Dolomite

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A.

B.

C.

D.

E.

F.

G.

H.

I.

J.

K.

L.

M.

N.

O.

Sample 1:
What is this metamorphic rock?

Amphibolite

Quartzite

Slate

Phyllite

Muscovite schist

Biotite schist

Chlorite schist (greenschist)

Glaucophane schist (blueschist)

Gneiss

Migmatite

Marble (calcite)

Marble (dolomite)

Metaconglomerate

Anthracite

Serpentinite

A.

B.

C.

D.

E.

F.

G.

H.
I.

J.

K.

QUESTION 5

Sample 1:
What is the likely protolith for this rock?

Shale or mudstone

Mudstone, shale, or slate

Mudstone, shale, slate, or phyllite
Basalt or other mafic rocks

Mudstone, shale, slate, phyllite, schist, granite, or diorite

Peat, lignite, bituminous coal

Basalt, gabbro, or peridotite

Sandstone

Limestone

Dolostone

Conglomerate

Any rock type

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A.

B.

QUESTION 6

Sample 2:
What is the texture of this metamorphic rock?

Foliated

Nonfoliated

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QUESTION 7

Material Mineral Scratched
Fingernail Yes 2.5
Copper Coin Yes 3.2
Knife Blade Yes 5.1
Window Glass Yes 5.5
Steel File Yes 6.5

Mineral 1
Streak: white
Relative Hardness Test

Breakage: Look at question below
Streak Color: white

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A.

B.

C.

D.

E.

Mineral Color: white, grey, silvery
Specific Gravity: 2.76–3.0
One plane of perfect cleavage
Luster: Nonmetallic
Other Properties: Cleavage flakes are elastic

Gypsum

Talc

Calcite

Muscovite

Biotite

A.

B.

C.

D.

E.

QUESTION 8

Material Mineral Scratched
Fingernail No 2.5
Copper Coin No 3.2
Knife Blade No 5.1
Window Glass No 5.5
Steel File No 6.5

Mineral 2
Streak: white

Relative Hardness Test

H = 7.0 – 7.5
Luster: Nonmetallic

Breakage: Fracture

Color: dark red

Specific Gravity: 3.1–4.3 – Density medium

Other Properties: N/A

Quartz

Amphibole

Pyroxene

Plagioclase

Garnet

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QUESTION 9

Sample 2:

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A.

B.

C.

D.

E.

F.

G.

H.

I.

J.

K.

L.

M.

N.

O.

What is this metamorphic rock?

Amphibolite

Quartzite

Slate

Phyllite

Garnet Muscovite schist

Garnet Biotite schist

Garnet chlorite schist (greenschist)

Glaucophane schist (blueschist)

Gneiss

Migmatite

Marble (calcite)

Marble (dolomite)

Metaconglomerate

Anthracite

Serpentinite

A.

B.

C.

D.

E.

F.

G.

H.

I.

J.

QUESTION 10

Sample 2:
What is the likely protolith for this rock?

Mudstone, or shale

Mudstone, shale, or slate

Mudstone, shale, slate, or phyllite

Mudstone, shale, slate, phyllite, schist, granite, or diorite

Basalt, gabbro, or perido�te

Sandstone

Limestone

Conglomerate

Mafic igneous rocks such as basalt and gabbro, or clay-rich
sedimentary rocks

Peat, lignite, bituminous

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QUESTION 11 1 points   Save Answer

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A.

B.

Sample 3:
What is the texture of this metamorphic rock?

Foliated

Nonfoliated

QUESTION 12

Material Mineral Scratched
Fingernail No 2.5
Copper Coin Yes 3.2
Knife Blade Yes 5.1
Window Glass Yes 5.5
Steel File Yes 6.5

Sample 3
Streak: White
Relative Hardness

H = 2.5–3.0
Breakage: One plane perfect cleavage.
Mineral Color: Dark brown, greenish-brown, blackish-brown
Specific Gravity: 2.7–3.3 – Density medium
Luster: Nonmetallic
Other Properties: Cleavage flakes are elastic

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A.

B.

C.

D.

E.

Gypsum

Talc

Calcite

Muscovite

Biotite

A.

B.

C.

D.

E.

F.

G.

H.

I.

J.

K.

L.

M.

N.

O.

QUESTION 13

Sample 3:
What is this metamorphic rock?

Amphibolite

Quartzite

Slate

Phyllite

Muscovite schist

Biotite schist

Chlorite schist (greenschist)

Glaucophane schist (blueschist)

Gneiss

Migmatite

Marble (calcite)

Marble (dolomite)

Metaconglomerate

Anthracite

Serpentinite

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A.

B.

C.

D.

E.

F.

G.

QUESTION 14

Sample 3:
What is the likely protolith for this rock?

Mudstone, or shale

Mudstone, shale, or slate

Mudstone, shale, slate, or phyllite

Mudstone, shale, slate, phyllite, schist, granite, or diorite

Basalt, gabbro, or perido�te
Sandstone

Limestone

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H.

I.

J.

K.

Dolostone

Conglomerate

Mafic igneous rocks such as basalt and gabbro, or clay-rich
sedimentary rocks

Peat, lignite, bituminous coal

QUESTION 15 1 points   Save Answer

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A.

B.

Sample 4:
What is the texture of this metamorphic rock?

Foliated

Nonfoliated

A.

B.

C.

D.

E.

QUESTION 16

Material Mineral Scratched
Fingernail No 2.5
Copper Coin No 3.2
Knife Blade No 5.1
Window Glass No 5.5
Steel File No 6.5

Sample 4

Streak: White
Relative Hardness

Breakage: Fracture with conchoidal fracture
Mineral Color: Colorless or white, yellow, red, purple, brown, gray,
etc. or other colors due to impurities
Specific Gravity: 2.65 – Density low
Luster: Nonmetallic
Other Properties: N/A

Olivine

Orthoclase

Plagioclase

Quartz

Calcite

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A.

B.

C.

D.

E.

F.

G.

H.

I.

J.

QUESTION 17

Sample 4:
What is this metamorphic rock?

Amphibolite

Quartzite

Slate

Phyllite

Muscovite schist

Biotite schist

Chlorite schist (greenschist)

Glaucophane schist (blueschist)

Gneiss

Migmatite

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K.

L.

M.

N.

O.

Marble (calcite)

Marble (dolomite)

Metaconglomerate

Anthracite

Serpentinite

A.

B.

C.

D.

E.

F.

G.

H.

I.

J.

K.

QUESTION 18

Sample 4:
What is the likely protolith for this rock?

Mudstone, or shale

Mudstone, shale, or slate

Mudstone, shale, slate, or phyllite

Mudstone, shale, slate, phyllite, schist, granite, or diorite

Basalt, gabbro, or perido�te
Sandstone

Limestone

Dolostone

Conglomerate

Mafic igneous rocks such as basalt and gabbro, or clay-rich
sedimentary rocks

Peat, lignite, bituminous coal

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QUESTION 19 1 points   Save Answer

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A.

B.

Sample 5:
What is the texture of this metamorphic rock?

Foliated

Nonfoliated

QUESTION 20

Material Mineral Scratched
Fingernail No 2.5
Copper Coin Yes 3.2
Knife Blade Yes 5.1
Window Glass Yes 5.5
Steel File Yes 6.5

Mineral 1
Streak: White
Relative Hardness

H = 2.5–3.0
Breakage: One plane perfect cleavage.
Mineral Color: Dark brown, greenish-brown, blackish-brown
Specific Gravity: 2.7–3.3 – Density medium
Luster: Nonmetallic
Other Properties: Cleavage flakes are elastic

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A.

B.

C.

D.

E.

Gypsum

Talc

Calcite

Muscovite

Biotite

A.

B.

C.

D.

E.

F.

G.

H.

I.

J.

K.

L.

M.

N.

O.

QUESTION 21

Sample 5:
This rock contains bands of plagioclase, quartz, and biotite. What is
this metamorphic rock?

Amphibolite

Quartzite

Slate

Phyllite

Muscovite schist

Biotite schist

Chlorite schist (greenschist)

Glaucophane schist (blueschist)

Gneiss

Migmatite

Marble (calcite)

Marble (dolomite)

Metaconglomerate

Anthracite

Serpentinite

1 points   Save Answer

A.

B.

C.

D.

E.

F.

QUESTION 22

Sample 5:
What is the likely protolith for this rock?

Mudstone, or shale

Mudstone, shale, or slate

Mudstone, shale, slate, or phyllite

Mudstone, shale, slate, phyllite, schist, granite, or diorite

Basalt, gabbro, or perido�te
Sandstone

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G.

H.

I.

J.

K.

Limestone

Dolostone

Conglomerate

Mafic igneous rocks such as basalt and gabbro, or clay-rich
sedimentary rocks

Peat, lignite, bituminous coal

A.

B.

QUESTION 23

Sample 6:
What is the texture of this metamorphic rock?

Foliated

Nonfoliated

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A.

B.

QUESTION 24

Sample 6:
This rock has a sheen. What is this metamorphic rock?

Amphibolite

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C.

D.

E.

F.

G.

H.

I.

J.

K.

L.

M.

N.

O.

Quartzite

Slate

Phyllite

Muscovite schist

Biotite schist

Chlorite schist (greenschist)

Glaucophane schist (blueschist)

Gneiss

Migmatite

Marble (calcite)

Marble (dolomite)

Metaconglomerate

Anthracite

Serpentinite

A.

B.

C.

D.

E.

F.

G.

H.

I.

J.

K.

QUESTION 25

Sample 6:
What is the likely protolith for this rock?

Mudstone, or shale

Mudstone, shale, or slate

Mudstone, shale, slate, or phyllite

Mudstone, shale, slate, phyllite, schist, granite, or diorite

Basalt, gabbro, or perido�te
Sandstone

Limestone

Dolostone

Conglomerate

Mafic igneous rocks such as basalt and gabbro, or clay-rich
sedimentary rocks

Peat, lignite, bituminous coal

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QUESTION 26 1 points   Save Answer

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A.

B.

Sample 7:
What is the texture of this metamorphic rock?

Foliated

Nonfoliated

A.

B.

C.

D.

E.

F.

G.

H.

QUESTION 27

Sample 7:
This rock contains the mineral serpentine. What is this
metamorphic rock?

Amphibolite

Quartzite

Slate

Phyllite

Muscovite schist

Biotite schist

Chlorite schist (greenschist)

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I.

J.

K.

L.

M.

N.

O.

Glaucophane schist (blueschist)

Gneiss

Migmatite

Marble (calcite)

Marble (dolomite)

Metaconglomerate

Anthracite

Serpentinite

A.

B.

C.

D.

E.

F.

G.

H.

I.

J.

K.

QUESTION 28

Sample 7:
What is the likely protolith for this rock?

Mudstone, or shale

Mudstone, shale, or slate

Mudstone, shale, slate, or phyllite

Mudstone, shale, slate, phyllite, schist, granite, or diorite

Basalt, gabbro, or perido�te
Sandstone

Limestone

Dolostone

Conglomerate

Mafic igneous rocks such as basalt and gabbro, or clay-rich
sedimentary rocks

Peat, lignite, bituminous coal

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QUESTION 29 1 points   Save Answer

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A.

B.

Sample 8:
What is the texture of this metamorphic rock?

Foliated

Nonfoliated

QUESTION 30

Material Mineral Scratched
Fingernail Yes 2.5
Copper Coin Yes 3.2
Knife Blade Yes 5.1
Window Glass Yes 5.5
Steel File Yes 6.5

Sample 8
Streak: Pale green to grey
Relative Hardness

H = 2.0 – 2.5

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Breakage: One plane cleavage

Mineral Color: Various shades of green

Specific Gravity: 2.6–3.3 – Density medium
Luster: Nonmetallic

Other Properties: Cleavage sheets are flexible but not elastic

Biotite

Muscovite

Amphibole

Chlorite

Talc

A.

B.

C.

D.

E.

F.

G.

H.

I.

J.

K.

L.

M.

N.

O.

QUESTION 31

Sample 8:
What is this metamorphic rock?

Amphibolite

Quartzite

Slate

Phyllite

Muscovite schist

Biotite schist

Chlorite schist (greenschist)

Glaucophane schist (blueschist)

Gneiss

Migmatite

Marble (calcite)

Marble (dolomite)

Metaconglomerate

Anthracite

Serpentinite

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A.

B.

QUESTION 32

Sample 8:
What is the likely protolith for this rock?

Mudstone, or shale

Mudstone, shale, or slate

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C.

D.

E.

F.

G.

H.

I.

J.

K.

Mudstone, shale, slate, or phyllite

Mudstone, shale, slate, phyllite, schist, granite, or diorite

Basalt, gabbro, or perido�te
Sandstone

Limestone

Dolostone

Conglomerate

Mafic igneous rocks such as basalt and gabbro, or clay-rich
sedimentary rocks

Peat, lignite, bituminous coal

A.

B.

QUESTION 33

Sample 9:
What is the texture of this metamorphic rock?

Foliated

Nonfoliated

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QUESTION 34

Sample 9
Mineral 1

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Material Mineral Scratched

Fingernail No 2.5

Copper Coin No 3.2

Knife Blade No 5.1

Window Glass No 5.5

Steel File Yes 6.5

Streak: white
Relative Hardness Test

H = 6.0 – 6.5

Breakage: Two planes of cleavage at 60o and 120o
Mineral Color: Black to dark green or brown
Specific Gravity: 2.9 – Density medium
Luster: Nonmetallic luster
Other Properties: This mineral is typically very shiny in
appearance. Pyroxene tend to appear dull.

What is Mineral 1?

Biotite

Muscovite

Amphibole

Chlorite

Pyroxene

A.

B.

C.

D.

E.

F.

G.

H.

I.

J.

K.

L.

M.

N.

O.

QUESTION 35

Sample 9:
What is this metamorphic rock?

Amphibolite

Quartzite

Slate

Phyllite

Muscovite schist

Biotite schist

Chlorite schist (greenschist)

Glaucophane schist (blueschist)

Gneiss

Migmatite

Marble (calcite)

Marble (dolomite)

Metaconglomerate

Anthracite

Serpentinite

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A.

B.

C.

D.

E.

F.

G.

H.

I.

J.

K.

QUESTION 36

Sample 9:
What is the likely protolith for this rock?

Mudstone, or shale

Mudstone, shale, or slate

Mudstone, shale, slate, or phyllite

Mudstone, shale, slate, phyllite, schist, granite, or diorite

Basalt, gabbro, or perido�te
Sandstone

Limestone

Dolostone

Conglomerate

Mafic igneous rocks such as basalt and gabbro, or clay-rich
sedimentary rocks

Peat, lignite, bituminous coal

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QUESTION 37 1 points   Save Answer

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A.

B.

Sample 10:
What is the texture of this metamorphic rock?

Foliated (Slatey cleavage)

Nonfoliated

A.

B.

C.

D.

E.

F.

G.

H.

I.

J.

K.

L.

M.

N.

O.

QUESTION 38

Sample 10:
What is this metamorphic rock?

Amphibolite

Quartzite

Slate

Phyllite

Muscovite schist

Biotite schist

Chlorite schist (greenschist)

Glaucophane schist (blueschist)

Gneiss

Migmatite

Marble (calcite)

Marble (dolomite)

Metaconglomerate

Anthracite

Serpentinite

1 points   Save Answer

A.

QUESTION 39

Sample 10:
What is the likely protolith for this rock?

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B.

C.

D.

E.

F.

G.

H.

I.

J.

K.

Mudstone, or shale

Mudstone, shale, or slate

Mudstone, shale, slate, or phyllite

Mudstone, shale, slate, phyllite, schist, granite, or diorite

Basalt, gabbro, or perido�te
Sandstone

Limestone

Dolostone

Conglomerate

Mafic igneous rocks such as basalt and gabbro, or clay-rich
sedimentary rocks

Peat, lignite, bituminous coal

A.

B.

QUESTION 40

Sample 11:
What is the texture of this metamorphic rock?

Foliated

Nonfoliated

1 points   Save Answer

A.

B.

QUESTION 41

In the above photograph Feature 1 indicates an igneous rock of
granitic composition. What does this rock indicate?

The rock is not metamorphic but igneous in origin.

The metamorphic rock has undergone partial melting.

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A.

B.

C.

D.

E.

F.

G.

H.

I.

J.

K.

L.

M.

N.

O.

QUESTION 42

Sample 11:
What is this metamorphic rock?

Amphibolite

Quartzite

Slate

Phyllite

Muscovite schist

Biotite schist

Chlorite schist (greenschist)

Glaucophane schist (blueschist)

Gneiss

Gneiss – Migmatite

Marble (calcite)

Marble (dolomite)

Metaconglomerate

Anthracite

Serpentinite

1 points   Save Answer

A.

B.

C.

D.

E.

F.

G.

H.

I.

J.

K.

QUESTION 43

Sample 11:
What is the likely protolith for this rock?

Mudstone, or shale

Mudstone, shale, or slate

Mudstone, shale, slate, or phyllite

Mudstone, shale, slate, phyllite, schist, granite, or diorite

Basalt, gabbro, or perido�te
Sandstone

Limestone

Dolostone

Conglomerate

Mafic igneous rocks such as basalt and gabbro, or clay-rich
sedimentary rocks

Peat, lignite, bituminous coal

1 points   Save Answer

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A.

B.

QUESTION 44

Sample 12:
What is the texture of this metamorphic rock?

Foliated

Nonfoliated

1 points   Save Answer

A.

B.

C.

D.

E.

F.

G.

H.

I.

J.

K.

L.

M.

N.

O.

QUESTION 45

Sample 12:
What is this metamorphic rock?

Amphibolite

Quartzite

Slate

Phyllite

Muscovite schist

Biotite schist

Chlorite schist (greenschist)

Glaucophane schist (blueschist)

Gneiss

Gneiss – Migmatite

Marble (calcite)

Marble (dolomite)

Metaconglomerate

Anthracite

Serpentinite

1 points   Save Answer

QUESTION 46

Sample 12:

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A.

B.

C.

D.

E.

F.

G.

H.

I.

J.

K.

What is the likely protolith for this rock?

Mudstone, or shale

Mudstone, shale, or slate

Mudstone, shale, slate, or phyllite

Mudstone, shale, slate, phyllite, schist, granite, or diorite

Basalt, gabbro, or perido�te
Sandstone

Limestone

Dolostone

Conglomerate

Mafic igneous rocks such as basalt and gabbro, or clay-rich
sedimentary rocks

Peat, lignite, bituminous coal

QUESTION 47 1 points   Save Answer

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A.

B.

Sample 12:
What is the texture of this metamorphic rock?

Foliated

Nonfoliated

QUESTION …