EXERCISE 1 DATA SHEET
Table 5. Metamorphic Rock Identification
Rock
Sample
Foliated
(Yes/No)
Grain Size
Other Textural
Features
Composition
Rock Name
Protolith
M
Yes
Medium
Smooth, hard to
touch
Amphibole,
biotite, calcite,
chlorite, garnet,
kyanite,
muscovite,
quartz,
sillimanite,
tourmaline
schist
Shale,
mudstone,
or siltstone
N
No Coarse Gritty to touch,
hard scaled
Dolomite,
calcite
marble
Limestone or
dolostone
O
No Fine Smooth to touch
but also hard and
displays conchoid
features Plagioclase
feldspar,
andalusite,
biotite,
sillimanite
hornfels
Any rock
type
P
Yes Medium Rough and hard,
slightly colorful
Plagioclase
feldspar.
Amphibole,
biotite, kyanite,
Muscovite,
potassium
feldspar,
sillimanite
Gneiss
Shale,
mudstone,
siltstone, or
granite Q
No
Fine grained
Gritty hardened
granular
Quartz Quartzite
Quartz-rich
sandstone
R
Yes Fine
Metallic luster,
hard shell features
Graphite,
tourmaline
anthracite
Bituminous
coal
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Metamorphic Rocks