Chapter 7 and 8 quiz
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Louisiana Technical College *
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115
Subject
Geology
Date
Dec 6, 2023
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docx
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Uploaded by BrigadierSnake3580
Chapter 7 and 8 quiz
Which of the following is not a geological era?
Paleozoic not answer
Phanerozoic
Proterozoic
Archean – not answer
Which of the following is not a geological era?
Paleozoic not answer
Phanerozoic
Mesozoic not answer
Cenozoic – not answer
which of the following statements accurately describes
geological time?
The Phanerozoic eon represents 90% of Earth’s history –
not answer
We are most familiar with the Mesozoic eon because most
of the organisms that we share earth with evolved at
various times during the Mesozoic eon
The Phanerozoic eon is divided into three eras
Each geological period is divided into multiple eons – not
answer
Which of the following statements does not accurately
describe geological time?
The current epoch is known as the Miocene
Which of the following is not a main factor that controls
metamorphic processes?
The temperature at which sedimentary rock formed
Which statement below does not apply to metamorphic
rocks?
Metamorphic rocks are typically formed deep beneath
other rocks where they are subjected to higher
temperatures and pressures – not answer
Metamorphic rocks typically have a different texture than
their parent rock – not answer
Metamorphic rocks typically have the same overall
chemical composition as their parent rock
Metamorphism typically results from the burial of igneous
rocks, but does not form sedimentary rocks
Which of the following statements does not accurately
describe geological time?
The current epoch is known as the Miocene
Parent rock
– The rock that exists before metamorphism
Dendrochronology
- A method for dating geological
materials using tree rings
Paleomagnetism
- A method for dating geological
materials using the magnetic field of rocks
Index fossils
- A fossil of an organism that lived for a relatively short
time period that is particularly useful for dating rocks
Magnetic Chronology
- A fossil of an organism for which the members
of the species have distinguishing features. Not answer
A fossil of an organism that lived for a relatively short time period that is
particularly useful for dating rocks
A method for dating geological materials using tree rings
A method for dating geological materials using the magnetic field of
rocks – great answer
Biozone Fossil
- A fossil of an organism for which the
members of the species have distinguishing features
Law of superposition
- The idea that young sedimentary rocks form
on top of older ones
Principle of faunal succession
- The concept that specific types of
organisms lived during different time intervals
Parent rock -
The rock that exists before metamorphism
starts
Metamorphism
- The change that takes place within a
body of rock as a result of it being subjected to conditions
that are different from those in which it formed
angular unconformity 2
- a boundary between two
sequences of sedimentary rocks where the underlying
ones have been eroded prior to the deposition of the
younger ones
Para conformity 4
- a time gap in a sequence of
sedimentary rocks that does not show up as an angular
unconformity or a disconformity
nonconformity 1
- a boundary between non-sedimentary
rocks (below) and sedimentary rocks (above)
Disconformity 3
- A boundary between two sequences of
sedimentary rocks where the underlying ones have been
eroded (but not tilted) prior to the deposition of the
younger ones
Unconformity
- An interruption in the process of
deposition of sedimentary rocks
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Select the definition that most closely matches the term
principle of cross-cutting relationships.
The concept that any geological feature that cuts across,
or disrupts another feature must be younger than the
feature that is disrupted
Radiocarbon dating can be applied to sedimentary rock,
but the materials must be younger than 60 ka.
True
The temperature that a rock is subjected to is a key
variable in controlling the type of metamorphism that
takes place, because mineral stability is dependent upon
temperature
–
true
Most metamorphic reactions take place very quickly
–
false
changes in Earth’s magnetic field are not able to be used
to date events in geologic history
. -
false
Isotopic dating of rocks is based on the fact that we know
the decay rates of certain unstable isotopes of elements
and that these rates have been constant over geological
time
. –
True
In most cases, isotopic dating techniques can be used to
directly date fossils
-
False
Dendrochronology has been used to date a major earthquake –
true
The Cretaceous has seen five major extinctions -
false
Most of the boundaries between the periods and epochs of the
geological time scale have been fixed on the basis of significant changes
in the fossil record –
true
Radiocarbon dating can be applied to sedimentary rock, but the
materials must be younger than 60 ka –
true or false