Laboratory 6 : Metamorphic Rocks: ESS 101 B Au 21: Introduction To Geology And Societal Impacts
Laboratory 6 : Metamorphic Rocks
Due Nov 26 at 11:30pm Points 13 Questions 35
Available Nov 12 at 9am - Nov 26 at 11:30pm 15 days Time Limit None
Allowed Attempts 2
Instructions
Learning Goals
By completing this lab, students will:
Understand the processes that form metamorphic rocks and the environments in which they take place
Develop a deeper understanding of the rock cycle and the general differences between igneous,
sedimentary, and metamorphic rock properties
Gain familiarity with common minerals that are found in metamorphic rocks, and gain practice identifying
metamorphic rocks
ESS101 Lab 6: Metamorphic rocks
Attempt History
Attempt Time Score
KEPT Attempt 2 11 minutes 12.67 out of 13 *
LATEST Attempt 2 11 minutes 12.67 out of 13 *
Attempt 1 1,539 minutes 11.54 out of 13 *
* Some questions not yet graded
1/42
, Laboratory 6 : Metamorphic Rocks: ESS 101 B Au 21: Introduction To Geology And Societal Impacts
Score for this attempt: 12.67 out of 13 *
Submitted Nov 26 at 10:29pm
This attempt took 11 minutes.
Introduction
Last week we learned about the processes that act to break down rocks at
earth’s surface, and we also explored the lithification processes that turn
weathered rock fragments into new sedimentary rocks. However, this is not
the end of the story for geological materials at earth’s surface. We know that
earth’s tectonic plates are constantly rearranging the crust, and this can
cause large pressure and temperature gradients at tectonic boundaries.
Rocks in these regions can be subjected to high pressures and/or
temperatures that can rearrange the minerals’ crystal structure. These
changes (collectively called metamorphism) can affect the rock’s
mineralogy (chemical composition) and/or its texture or appearance. Rocks
that have undergone these changes are called metamorphic rocks.
Figure 6-1. Metamorphic Temperature and Pressure Conditions. Note that
diagenesis refers to changes that happen at near-surface conditions during the
sedimentary lithification process, and it is not considered a metamorphic process.
Additionally, at very high temperatures and pressures, rock will melt into magma and
undergo other igneous processes.
Metamorphism can alter any rock that is subjected to temperatures and
pressures that are much greater than surface conditions but are not high
enough for the rock to re-melt into a magma. The pressure and temperature
2/42
, Laboratory 6 : Metamorphic Rocks: ESS 101 B Au 21: Introduction To Geology And Societal Impacts
Question 1 0..2 pts
Laboratory Honor Statement
Cheating or plagiarism of any kind will not be tolerated in ESS 101. This
includes copying answers from a friend or classmate, copying answers
verbatim found on the internet or other literary sources, or copying any work
that may answer the question being asked. Make sure you always use your
3/42
, Laboratory 6 : Metamorphic Rocks: ESS 101 B Au 21: Introduction To Geology And Societal Impacts
Correct!
Question 2 0..2 pts
Which type of metamorphic rock would look most similar to its protolith?
High-grade metamorphic rock
Correct! Low-grade metamorphic rock
Question 3 0..2 pts
Using Figure 6-1, match each of these formation conditions to the type of
rock that would form.
Correct! 150C and 150 MPa sedimentary
4/42
Laboratory 6 : Metamorphic Rocks
Due Nov 26 at 11:30pm Points 13 Questions 35
Available Nov 12 at 9am - Nov 26 at 11:30pm 15 days Time Limit None
Allowed Attempts 2
Instructions
Learning Goals
By completing this lab, students will:
Understand the processes that form metamorphic rocks and the environments in which they take place
Develop a deeper understanding of the rock cycle and the general differences between igneous,
sedimentary, and metamorphic rock properties
Gain familiarity with common minerals that are found in metamorphic rocks, and gain practice identifying
metamorphic rocks
ESS101 Lab 6: Metamorphic rocks
Attempt History
Attempt Time Score
KEPT Attempt 2 11 minutes 12.67 out of 13 *
LATEST Attempt 2 11 minutes 12.67 out of 13 *
Attempt 1 1,539 minutes 11.54 out of 13 *
* Some questions not yet graded
1/42
, Laboratory 6 : Metamorphic Rocks: ESS 101 B Au 21: Introduction To Geology And Societal Impacts
Score for this attempt: 12.67 out of 13 *
Submitted Nov 26 at 10:29pm
This attempt took 11 minutes.
Introduction
Last week we learned about the processes that act to break down rocks at
earth’s surface, and we also explored the lithification processes that turn
weathered rock fragments into new sedimentary rocks. However, this is not
the end of the story for geological materials at earth’s surface. We know that
earth’s tectonic plates are constantly rearranging the crust, and this can
cause large pressure and temperature gradients at tectonic boundaries.
Rocks in these regions can be subjected to high pressures and/or
temperatures that can rearrange the minerals’ crystal structure. These
changes (collectively called metamorphism) can affect the rock’s
mineralogy (chemical composition) and/or its texture or appearance. Rocks
that have undergone these changes are called metamorphic rocks.
Figure 6-1. Metamorphic Temperature and Pressure Conditions. Note that
diagenesis refers to changes that happen at near-surface conditions during the
sedimentary lithification process, and it is not considered a metamorphic process.
Additionally, at very high temperatures and pressures, rock will melt into magma and
undergo other igneous processes.
Metamorphism can alter any rock that is subjected to temperatures and
pressures that are much greater than surface conditions but are not high
enough for the rock to re-melt into a magma. The pressure and temperature
2/42
, Laboratory 6 : Metamorphic Rocks: ESS 101 B Au 21: Introduction To Geology And Societal Impacts
Question 1 0..2 pts
Laboratory Honor Statement
Cheating or plagiarism of any kind will not be tolerated in ESS 101. This
includes copying answers from a friend or classmate, copying answers
verbatim found on the internet or other literary sources, or copying any work
that may answer the question being asked. Make sure you always use your
3/42
, Laboratory 6 : Metamorphic Rocks: ESS 101 B Au 21: Introduction To Geology And Societal Impacts
Correct!
Question 2 0..2 pts
Which type of metamorphic rock would look most similar to its protolith?
High-grade metamorphic rock
Correct! Low-grade metamorphic rock
Question 3 0..2 pts
Using Figure 6-1, match each of these formation conditions to the type of
rock that would form.
Correct! 150C and 150 MPa sedimentary
4/42
