GEOL 1301 - Lab 05 - Metamorphic Rocks
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GEOL 1301
Lab 05
Metamorphic Rocks
Observe and record the properties of the metamorphic rock samples listed in the first table and use them to identify the samples. Lists of properties can be found below, as well as links to rock identification keys. Please complete both attached worksheets, then upload your completed lab on Canvas.
Grain Size:
Gravel > 2 mm
Sand 0.06-2 mm
Silt 0.004-0.06 mm
Clay < 0.004 mm
Foliation:
Foliated
Non-foliated
Composition:
Can you identify any minerals in the rock?
Other Observations:
Color
Banding
Cleavage
…
Identification Keys and Information About Rocks:
http://geology.about.com/od/rocks/a/Rock-Tables.htm
http://jersey.uoregon.edu/~mstrick/MinRockID/RockID/MetaClass.html
http://en.wikipedia.org/wiki/Metamorphism
Examining and Classifying Metamorphic Rocks
Use the following link to identify the sedimentary rock samples listed in the table:
http://profharwood.x10host.com/GEOL101/Labs/Metamorf/index.htm
Sample
Number
Foliation
Grain Size
Composition
Other Observations
Rock Name
1
Gneissic banding
Gravel
Feldspar, mica, quartz
Non-reactive to HCL, Parent rock: Schist
Gneiss
2
Schistose
Gravel
Mica, quartz
Non-reactive to HCL, Parent rock: Slate
Schist
3
Non-Foliated
Sand
Calcite
Reactive to HCL, Hardness=3, Parent rock: Limestone
Marble
4
Slaty
Clay
Mica
Non-reactive to HCL, Parent rock: Mudstone
Slate
5
Schistose
Gravel
Mica, quartz
Non-reactive to HCL, Parent rock: Slate
Schist
6
Non-Foliated
Sand
quartz
Non-reactive to HCL, Hardness=7, Parent rock: Sandstone
Quartzite
7
Phyllitic
Sand
Quartz, Mica, Chlorite
Non-reactive to HCL, Hardness=7, Parent rock: Mudstone
Phyllite
Metamorphic Rock Formation
What are the likely parent rocks of the rocks that you identified in the first part of the lab? What is their approximate metamorphic grade? What are the likely types of metamorphism that the rocks experienced?
Sample #/Rock Name
Parent Rock and Metamorphic Grade
1 - Gneiss
Parent rock: Schist
Metamorphic grade: High grade
2 - Schist
Parent rock: Slate
Metamorphic grade: Medium grade
3 - Marble
Parent rock: Limestone
Metamorphic grade: Low – High grade
4 - Slate
Parent rock: Mudstone
Metamorphic grade: Low grade
5 - Schist
Parent rock: Slate
Metamorphic grade: Medium grade
6 - Quartzite
Parent rock: Sandstone
Metamorphic grade: High grade
7 - Phyllite
Parent rock: Mudstone
Metamorphic grade: Low grade
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