Unit3_Lab_SedMetRocks
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Broward College *
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GLY1010
Subject
Geology
Date
Feb 20, 2024
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docx
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5
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Rock Identification Lab Activity: Sedimentary and Metamorphic Rocks
Instructions: Used the assigned reading sections and the charts below to identify the rock samples. Please make sure to carefully review the tutorial video on D2L that displays each sample virtually.
Sedimentary Rocks Identification
Sample
Grain Size
Texture
(Sediment Class)
Properties
Name
1
(0.039 to 0.063mm)
clastic
Very fine-grained
Siltstone
2
(<0.0039mm)
clastic
Chemical precipitates Shale
3
(2 mm)or greater
clastic
cemented shell fragments
coquina
4
Microscopic to very coarse can be either crystalline or clastic
extremely durable
limestone
5
boulder in a matrix
Clastic
Rounded fragments Conglomerate
6
(<0.0039mm)
Crystaline Compacted
to an incredible amount of pressure
Anthracite/coal
Metamorphic Rocks Identification Chart
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Metamorphic Rocks Identification
Sample
Grain Size
Texture
Composition
Name
1
Fine to coarse
Nonfoliate
Calcite and/ or dolomite Marble 2
Fine to medium Foliated
Micra, Quartz, Feldspar Phyllite
3
Fine to coarse
Nonfoliate
Quartz
Quartzite
4
Fine Foliated Micra
Slate 5
Fine to medium
Foliated Micra, Quartz, Feldspar, Garnet, Amphibole Schist
6
Coarse
Nonfoliate Varius minerals Meta-conglomerate