GEOL 1301 - Lab 05 - Metamorphic Rocks.
docx
keyboard_arrow_up
School
University of Florida *
*We aren’t endorsed by this school
Course
1305
Subject
Geology
Date
Feb 20, 2024
Type
docx
Pages
3
Uploaded by BailiffBook105100
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
Medium to coarse Feldspar, mica, quartz
Texture: foliation Color: black, squiggly white
Gneiss 2
Schistose
.25-2 mm
Mica, quartz
Texture: foliated Color: gold, grey, shiny
Schist 3
n/a .5-1.5 mm
Calcite
Texture: non-foliated Color: pink, orange, brown
Marble
4
Slaty
Very Fine-
grained Mica
Texture: foliated Color: black
Slate
5
Schistose
.25-2 mm
Mica, quartz
Texture: foliated Color: black, grey, white specks
Schist
6
n/a
Medium grained
Quartz Texture: non-foliated Color: light grey, yellowish, whiteish specks Quartzite 7
Phyllitic
Fine-grained
Quartz, mica, chlorite
Texture: foliated Color: black, shiny, gold, white aspects 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: variable #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: variable
#7/ Phyllite
Parent rock: mudstone Metamorphic grade: low-grade
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help